Cardi B's sister, Hennessy Carolina, is being roped into the $15 million legal battle with the rapper's former management as her younger sis is set to be subpoenaed in the case.

On February 5, Cardi’s lawyer filed court docs as part of her ongoing case with her former manager, Klenord "Shaft" Raphael.

The docs note that both parties have been exchanging discovery in the case, including Cardi turning over 8,400 documents which included text messages. Sony Music, Creative Artists Agency, Atlantic Records and Live Nation have all turned over documents after being served subpoenas about Cardi.

Cardi says she is also in the process of requesting a forensic examination of electronically stored info that may have been deleted by one of her former lawyers connected to the case.

Shaft has informed Cardi that he plans on serving her sister, Hennessy Carolina, with a subpoena this week, demanding she sit for a deposition and hand over key evidence he believes will help his case.

Raphael sued Cardi B last April for $10 million, claiming she breached their contract by ditching him as her manager.

Cardi B counter-sued Raphael seeking $15 million in damages, accusing him of screwing her over after she entrusted him and his companies with many aspects of her business affairs.

She claimed that despite him having a duty to act in her best interest, he took advantage of her “trust and naiveté and persuaded her to sign contracts and to enter into deals in which Mr. Raphael attempted to take an unreasonable and unconscionable portion of [her] earnings in the entertainment industry for himself.”

In 2015, Cardi B said she signed her deal with Raphael’s company — without a lawyer — which provided her former manager with a 20% cut of her earnings. She says he breached their deal by failing to provide monthly accounting, failed to appoint an independent business manager and for not providing her with adequate payments owed to her.

Both cases remain ongoing.

Earlier this year, Cardi’s father, Carlos Almanzar, was served with a subpoena in the case along with her husband, Offset. The ex-manager wants to grill each about Cardi and what they know about the case.