Lawyers for Sean “Diddy” Combs say they’ll be questioning R&B singer Cassie about how infidelity fueled her combustible, nearly 11-year relationship with the music mogul, who is on trial for sex trafficking. The defense cross-examination of the prosecution's star witness will begin Thursday in a Manhattan courtroom. It'll be Cassie's third day on the witness stand after having testified that Combs raped her when she broke up with him in 2018. She also said Combs locked her into a life of physical abuse by threatening to release degrading sexual videos of her. Combs denies the allegations. He faces at least 15 years in prison if convicted.