A Brooklyn teen accused of fatally shooting her mom plans to ask that she be tried separately from her onetime beau and alleged accomplice, her lawyer revealed Thursday.

Defense attorney Peter Guadagino told The Post he plans to file a motion to sever the case of his young client, Destiny Garcia, from her co-defendant, Jerry Maisonett, in the coming weeks.

Garcia, then 15-years-old, and Maisonett, then 28, stand accused of opening fire on Garcia’s mother, Rosie Sanchez, and her boyfriend, Anderson Nunez, in their Sheepshead Bay apartment in late December 2015.

The teen, now 17, allegedly roped in Maisonett by telling him she’d been raped by Nunez. She shot her mother once, before both she and Maisonett opened fire on Nunez, prosecutors said.

The teen then stabbed Nunez “over 30 times,” according to authorities.

She later changed her story, and told cops the slayings occurred because her mother beat her.

If convicted, Maisonett faces life in prison without the possibility of parole, while Garcia faces up to 30 years to life in prison for the slayings.

They’ve both pleaded not guilty.