Ireland, C.J.
We granted the defendant’s application for further appellate review limited to whether the defendant’s conviction of indecent assault and battery on a child under the [216]*216age of fourteen years, in violation of G. L. c. 265, § 13B, was duplicative of his conviction of rape of a child under the age of sixteen years, in violation of G. L. c. 265, § 23 (statutory rape).1 In an unpublished memorandum and order pursuant to its rule 1:28, the Appeals Court concluded that the charges were not duplicative, and affirmed the convictions. Commonwealth v. Suero, 81 Mass. App. Ct. 1108 (2012). Because we conclude that a judge must determine whether a defendant’s conduct constitutes separate acts that are sufficiently distinct to support convictions of indecent assault and battery on a child under fourteen and statutory rape, and that here the defendant’s actions underlying the two convictions were not separate and distinct, we vacate the defendant’s conviction of indecent assault and battery on a child under fourteen and affirm his conviction of rape of a child under sixteen.
Background facts. We present the essential facts the jury could have found. In 2005, the defendant moved in with his girl friend and her four children, two boys and two girls. The victim, who was nine years old, shared a bed with her sister in one bedroom. The two boys also shared a bedroom down the hall from the girls’ bedroom.
On December 28, 2005, the victim watched television until 8 p.m., her usual bedtime. The defendant had just returned home. The victim, wearing shorts and a tank top, joined her sister, who was already in bed.
While she slept, the victim felt someone hit her face and move her over to the edge of the bed. Although the bedroom light was off, the light coming from the kitchen and through the window illuminated her room so that she could see the defendant kneeling next to her side of the bed. When the defendant asked her to move over closer to him, the victim recognized his [217]*217voice. Once she had moved closer to the edge of the bed, the defendant pulled her underwear and shorts to the side. He then put his mouth in her “private” and moved it around. She told him to stop, but he did not. After “back[ing] away a little,” the defendant “slip[ped his fingers] closer to [her] private,” “opened [it] with his fingers” and started to “lick [it].” The victim told him to go to his room. He stated, “Just wait,” and left the girls’ room.
The victim got out of bed and was making her way down the hall to her brothers’ room when she saw the defendant in the bathroom. As she passed by, the defendant told her not to tell her family because they would “put [him] in jail” or “kill [him].” He also stated that he had two daughters of his own and that he would “never do that to them.”
The victim continued down the hall to her brothers’ room, then went with one of her brothers to the living room, where they began watching a movie to “get [her] mom’s attention.” The mother, who was awakened by the defendant’s coming to bed, saw the lights on in the dining room through the bottom of the door and got up to shut them off. When she saw the children in the living room, the victim told her something “really, really serious” had happened. After being told what had occurred, the mother telephoned 911. The victim was taken to a hospital for examination.
On February 22, 2006, an Essex County grand jury returned indictments charging the defendant with rape of a child with force, G. L. c. 265, § 22A, and indecent assault and battery on a child under the age of fourteen, G. L. c. 265, § 13B. The Commonwealth amended the two indictments to include the specific acts related to the charges. For the indictment alleging a violation of G. L. c. 265, § 22A, the charges stated, “having] sexual intercourse and/or unnatural intercourse with . . . a child under sixteen years of age, ... to wit: by means of oral penetration or digital penetration.” For the indictment alleging a violation of G. L. c. 265, § 13B, the charges stated, “commit[ting] an indecent assault and battery on ... a child under fourteen years, to wit: by moving the child’s shorts and underwear to the side.”2 Prior to trial, the Commonwealth [218]*218amended the indictment charging rape of a child with force to statutory rape. See note 1, supra.
The defendant moved for required findings of not guilty at the close of the Commonwealth’s case and the close of all evidence, and for a judgment notwithstanding the verdict after the jury’s verdicts, arguing that his conduct was not separate and distinct because the moving of the clothing was necessary to the rape. Citing to the facts, the Superior Court judge denied the defendant’s motions.
The judge instructed the jury: “The alleged proof of [indictments] 1 and 2 must be based on proof of wholly separate acts. Stated another way, [indictments] 1 and 2 cannot be proven by a single act.” He also instructed that the jurors “must be unanimous as to which specific act constitutes the offense charged.” After the jury found the defendant guilty of both charges, the judge sentenced the defendant to from four to five years in State prison for the rape conviction, to be followed by ten years’ probation for the indecent assault and battery conviction.
Discussion. The Commonwealth argues that the defendant’s convictions should be upheld because the evidence supported convictions of both crimes, and the jury, after being properly instructed that the crimes “must be based on proof of wholly separate acts,”3 found the defendant guilty.
The defendant asserts, as he did below, that his conviction of indecent assault and battery on a child under the age of fourteen should be vacated because it is duplicative of his conviction of rape of a child under sixteen and violates his due process rights under the Fifth and Fourteenth Amendments to the United States Constitution and art. 12 of the Massachusetts Declaration of Rights. He argues that his actions were “so closely related in fact as to constitute in substance but a single crime.” Commonwealth v. St. Pierre, 377 Mass. 650, 662-663 (1979). He also argues that this case is more analogous to Commonwealth v. Howze, [219]*21958 Mass. App. Ct. 147, 153 (2003) (charge of indecent assault and battery vacated because removal of victim’s clothing was “sufficiently bound up with and necessary to” rape), than to Commonwealth v. Maldonado, 429 Mass. 502, 509-510 (1999) (convictions of assault and battery by means of dangerous weapon and murder upheld where defendant shot two victims, then made sure victims were dead by shooting each a second time). We conclude that, in these circumstances, the charges of assault and battery on a child under fourteen, and rape of a child under sixteen are duplicative. See Commonwealth v. Mamay, 407 Mass. 412, 418 (1990), quoting Commonwealth v. Thomas, 401 Mass. 109, 120 (1987) (noting distinction between situations where indecent assault and battery and rape constitute one crime and situations where offenses were “separate and incidental”).
“Under our long-standing rule derived from Morey v. Commonwealth, 108 Mass. 433, 434 (1871), a lesser included offense is one whose elements are a subset of the elements of the charged offense.” Commonwealth v. Porro, 458 Mass. 526, 531 (2010).
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Ireland, C.J.
We granted the defendant’s application for further appellate review limited to whether the defendant’s conviction of indecent assault and battery on a child under the [216]*216age of fourteen years, in violation of G. L. c. 265, § 13B, was duplicative of his conviction of rape of a child under the age of sixteen years, in violation of G. L. c. 265, § 23 (statutory rape).1 In an unpublished memorandum and order pursuant to its rule 1:28, the Appeals Court concluded that the charges were not duplicative, and affirmed the convictions. Commonwealth v. Suero, 81 Mass. App. Ct. 1108 (2012). Because we conclude that a judge must determine whether a defendant’s conduct constitutes separate acts that are sufficiently distinct to support convictions of indecent assault and battery on a child under fourteen and statutory rape, and that here the defendant’s actions underlying the two convictions were not separate and distinct, we vacate the defendant’s conviction of indecent assault and battery on a child under fourteen and affirm his conviction of rape of a child under sixteen.
Background facts. We present the essential facts the jury could have found. In 2005, the defendant moved in with his girl friend and her four children, two boys and two girls. The victim, who was nine years old, shared a bed with her sister in one bedroom. The two boys also shared a bedroom down the hall from the girls’ bedroom.
On December 28, 2005, the victim watched television until 8 p.m., her usual bedtime. The defendant had just returned home. The victim, wearing shorts and a tank top, joined her sister, who was already in bed.
While she slept, the victim felt someone hit her face and move her over to the edge of the bed. Although the bedroom light was off, the light coming from the kitchen and through the window illuminated her room so that she could see the defendant kneeling next to her side of the bed. When the defendant asked her to move over closer to him, the victim recognized his [217]*217voice. Once she had moved closer to the edge of the bed, the defendant pulled her underwear and shorts to the side. He then put his mouth in her “private” and moved it around. She told him to stop, but he did not. After “back[ing] away a little,” the defendant “slip[ped his fingers] closer to [her] private,” “opened [it] with his fingers” and started to “lick [it].” The victim told him to go to his room. He stated, “Just wait,” and left the girls’ room.
The victim got out of bed and was making her way down the hall to her brothers’ room when she saw the defendant in the bathroom. As she passed by, the defendant told her not to tell her family because they would “put [him] in jail” or “kill [him].” He also stated that he had two daughters of his own and that he would “never do that to them.”
The victim continued down the hall to her brothers’ room, then went with one of her brothers to the living room, where they began watching a movie to “get [her] mom’s attention.” The mother, who was awakened by the defendant’s coming to bed, saw the lights on in the dining room through the bottom of the door and got up to shut them off. When she saw the children in the living room, the victim told her something “really, really serious” had happened. After being told what had occurred, the mother telephoned 911. The victim was taken to a hospital for examination.
On February 22, 2006, an Essex County grand jury returned indictments charging the defendant with rape of a child with force, G. L. c. 265, § 22A, and indecent assault and battery on a child under the age of fourteen, G. L. c. 265, § 13B. The Commonwealth amended the two indictments to include the specific acts related to the charges. For the indictment alleging a violation of G. L. c. 265, § 22A, the charges stated, “having] sexual intercourse and/or unnatural intercourse with . . . a child under sixteen years of age, ... to wit: by means of oral penetration or digital penetration.” For the indictment alleging a violation of G. L. c. 265, § 13B, the charges stated, “commit[ting] an indecent assault and battery on ... a child under fourteen years, to wit: by moving the child’s shorts and underwear to the side.”2 Prior to trial, the Commonwealth [218]*218amended the indictment charging rape of a child with force to statutory rape. See note 1, supra.
The defendant moved for required findings of not guilty at the close of the Commonwealth’s case and the close of all evidence, and for a judgment notwithstanding the verdict after the jury’s verdicts, arguing that his conduct was not separate and distinct because the moving of the clothing was necessary to the rape. Citing to the facts, the Superior Court judge denied the defendant’s motions.
The judge instructed the jury: “The alleged proof of [indictments] 1 and 2 must be based on proof of wholly separate acts. Stated another way, [indictments] 1 and 2 cannot be proven by a single act.” He also instructed that the jurors “must be unanimous as to which specific act constitutes the offense charged.” After the jury found the defendant guilty of both charges, the judge sentenced the defendant to from four to five years in State prison for the rape conviction, to be followed by ten years’ probation for the indecent assault and battery conviction.
Discussion. The Commonwealth argues that the defendant’s convictions should be upheld because the evidence supported convictions of both crimes, and the jury, after being properly instructed that the crimes “must be based on proof of wholly separate acts,”3 found the defendant guilty.
The defendant asserts, as he did below, that his conviction of indecent assault and battery on a child under the age of fourteen should be vacated because it is duplicative of his conviction of rape of a child under sixteen and violates his due process rights under the Fifth and Fourteenth Amendments to the United States Constitution and art. 12 of the Massachusetts Declaration of Rights. He argues that his actions were “so closely related in fact as to constitute in substance but a single crime.” Commonwealth v. St. Pierre, 377 Mass. 650, 662-663 (1979). He also argues that this case is more analogous to Commonwealth v. Howze, [219]*21958 Mass. App. Ct. 147, 153 (2003) (charge of indecent assault and battery vacated because removal of victim’s clothing was “sufficiently bound up with and necessary to” rape), than to Commonwealth v. Maldonado, 429 Mass. 502, 509-510 (1999) (convictions of assault and battery by means of dangerous weapon and murder upheld where defendant shot two victims, then made sure victims were dead by shooting each a second time). We conclude that, in these circumstances, the charges of assault and battery on a child under fourteen, and rape of a child under sixteen are duplicative. See Commonwealth v. Mamay, 407 Mass. 412, 418 (1990), quoting Commonwealth v. Thomas, 401 Mass. 109, 120 (1987) (noting distinction between situations where indecent assault and battery and rape constitute one crime and situations where offenses were “separate and incidental”).
“Under our long-standing rule derived from Morey v. Commonwealth, 108 Mass. 433, 434 (1871), a lesser included offense is one whose elements are a subset of the elements of the charged offense.” Commonwealth v. Porro, 458 Mass. 526, 531 (2010). “[W]hether two offenses are ‘so closely related in fact as to constitute in substance but a single crime,’ . . . becomes pertinent in a single criminal proceeding where one crime is a lesser included offense of the other.” See Commonwealth v. Vick, 454 Mass. 418, 435 (2009), quoting Commonwealth v. St. Pierre, supra at 662-663. Because the Fifth Amendment guarantees that “no person may be twice placed in jeopardy for the same criminal offense,” Cruz v. Commonwealth, 461 Mass. 664, 670 (2012), “[cjonvictions of both greater and lesser included acts are permitted only where they ‘rest on separate and distinct acts.’ ” Commonwealth v. Gouse, 461 Mass. 787, 798 (2012), quoting Commonwealth v. Jackson, 80 Mass. App. Ct. 528, 529 (2011).
We conclude, and the parties do not contest, that where a child is under the age of fourteen, the crime of indecent assault and battery on a child under fourteen, in violation of G. L. c. 265, § 13B, is a lesser included offense of the crime of rape of a child under sixteen, in violation of G. L. c. 265, § 23.4 See [220]*220Commonwealth v. Howze, supra at 150 (“[I]ndecent assault and battery of a child and statutory rape[] are cognate offenses; specifically, indecent assault and battery is a lesser included offense of statutory rape, at least as G. L. c. 265, § 13B, is codified since its amendment by St. 1986, c. 187”).5 The parties disagree whether the defendant’s actions were sufficiently separate and distinct to comprise more than one criminal act.
We conclude that, in the circumstances here, convictions of the greater offense of statutory rape, and the lesser included offense of indecent assault and battery, were not based on separate and distinct acts. See Commonwealth v. King, 445 Mass. 217, 225 (2005), cert, denied, 546 U.S. 1216 (2006), and cases cited; Commonwealth v. Howze, supra at 153 (where criminal act of indecent assault and battery necessary to act of rape, “due process forbids separating the conduct into discrete units for prosecution”). Like the defendant’s actions in Commonwealth v. Howze, supra, here, the moving of the victim’s underwear to the side was “necessarily accomplished on the commission of the greater crime of rape.” Commonwealth v. D’Amour, 428 Mass. 725, 748 (1999). Additionally, the defendant’s actions occurred “in a single stream of conduct” that was “governed by a single criminal design.” Commonwealth v. Howze, supra. Cf. Commonwealth v. Neils N., 73 Mass. App. Ct. 689, 697 (2009) (acts supporting assault and battery and rape indictments were “separate in time, the form of the conduct, and the defend[221]*221ant’s intent”). To be sure, a defendant’s actions underlying charges of indecent assault and battery on a child under fourteen and rape can lead to separate convictions and punishments.6 However, here, the conduct supporting the indecent assault and battery was incidental and necessary to the rape, and the two crimes were duplicative. See Commonwealth v. Porro, 458 Mass. 526, 534 (2010) (because “elements in threatened battery are generally incidental to an intentional assault and battery,” crimes are duplicative).
The prohibition against duplicative convictions ensures that “the court does not exceed its legislative authorization by imposing multiple punishments for a single legislatively defined offense.” Commonwealth v. Crocker, 384 Mass. 353, 360 (1981). In other criminal contexts, this court has determined whether the Legislature intended to punish conduct for two or more charges, where the conduct may have constituted one criminal act. See Commonwealth v. Jones, 382 Mass. 387, 394 (1981) (Legislature did not intend “to punish a defendant for the two less serious motor vehicle offenses if [the defendant] is already being punished under the most serious offense of manslaughter”); Kuklis v. Commonwealth, 361 Mass. 302, 308 (1972) (“it was not the legislative intent that a defendant should be punished for both possession of a drug and being present where the drug was kept, where the two charges involve the same time and place, and the identical mass of a single drug”). We reach the same conclusion here.
We next address the issue whether a jury or a judge should decide whether a defendant, who has been charged with indecent assault and battery on a child and statutory rape, has committed actions that are sufficiently separate and distinct as to factually comprise different crimes. See Commonwealth v. St. Pierre, 377 Mass. 650, 662-663 (1979). The Commonwealth points out that [222]*222a conflict exists in our case law regarding this issue. See Commonwealth v. Keohane, 444 Mass. 563, 575 (2005) (“[T]he judge may determine whether the actions of a defendant are so closely related in fact as to constitute in substance but one crime”); Commonwealth v. Maldonado, 429 Mass. 502, 509 (1999) (with judge’s instruction, jury decide whether crimes are separate and distinct acts). The Commonwealth asserts that, in the circumstances here, there was no error because the jury, who had been presented with evidence to support both crimes and had been properly instructed, found the defendant guilty of two separate acts.
Whether the Commonwealth has presented facts to support each charged crime beyond a reasonable doubt is a matter for the jury, and the judge must instruct the jury on separate and distinct acts. See Commonwealth v. Roderiques, 462 Mass. 415, 424-425 (2012); Commonwealth v. Maldonado, supra. In addition, because the guarantee that “no person may be twice placed in jeopardy for the same criminal offense,” Cruz v. Commonwealth, 461 Mass. 664, 670 (2012), and cases cited, applies to situations such as this one, a judge also must determine whether the convictions violate the defendant’s rights under the double jeopardy clause of the Fifth Amendment and Massachusetts statutory and common law. See id. As a matter of first impression, we conclude that on the request of defense counsel for a judgment notwithstanding the verdict, a judge shall determine whether separate and distinct acts support convictions of both indecent assault and battery on a child under fourteen and statutory rape. The standard of review for such a determination is an abuse of discretion or other error of law.
Our conclusion should not be interpreted to mean we wish to impinge on the Commonwealth’s right to prosecute where a single criminal event may result in charges for a number of crimes. “The Commonwealth has broad discretion in deciding whether to prosecute a case; judicial review of these decisions must proceed circumspectly lest we intrude on a function constitutionally vouchsafed to another branch of government.”7 Commonwealth v. Bernardo B., 453 Mass. 158, 161 (2009). Our [223]*223conclusion also does not suggest that the jury could not, as a matter of fact, find the defendant guilty of one or many crimes.8 However, a judge has the discretion to conclude, as we do here, that convictions of indecent assault and battery of a child under fourteen and statutory rape are duplicative and violate a defendant’s rights to due process. See Commonwealth v. Vick, 454 Mass. 418, 435 (2009). Here, because the defendant’s actions did not constitute separate and distinct acts, his conduct cannot support the two sentences and convictions. See Commonwealth v. Howze, 58 Mass. App. Ct. 147, 153 (2003) (“Where the practical coincidence of the acts is sufficiently great, even where it is theoretically possible to parse them temporally, spatially, or otherwise, multiple convictions and punishments are not permissible”).
Conclusion. An appropriate remedy in a case such as this, in order “to prevent multiple punishments, is to vacate both the conviction and sentence on the lesser included offense, and to affirm on the more serious offense.” See Commonwealth v. Valliere, 437 Mass. 366, 371-372 (2002). We therefore vacate the defendant’s conviction of, and sentence for, indecent assault and battery on a child under fourteen pursuant to G. L. c. 265, § 13B, affirm the conviction of statutory rape pursuant to G. L. c. 265, § 23, and remand the case for resentencing consistent with this opinion.
So ordered.