Sean “Diddy” Combs reportedly made Casandra "Cassie" Ventura refer to him as “Pop Pop” — the name she called her own grandfather. Ventura, who is 17 years younger than Combs, testified in court on Tuesday, May 13, about her years-long relationship with the music mogul who's now on trial for sex-crimes and racketeering.

Cassie Ventura, a longtime girlfriend of Sean "Diddy" Combs, said she loved the hip-hop mogul and felt a sense of duty to join "freak offs."

After being chosen during jury selection just this morning, jurors have already heard opening statements and witness testimony in the trial of music mogul Sean "Diddy" Combs. Here's a recap of what happened in court today.

The federal sex trafficking case against Sean “Diddy” Combs began with disturbing and graphic testimony from a key witness. Daniel Phillip, a 41-year-old escort, testified that the music mogul paid him large sums to perform sexual acts with Diddy's ex-girlfriend, Cassie Ventura, while Diddy observed and gave directions.

Casandra “Cassie” Ventura is expected to take the stand in her ex Sean “Diddy” Combs Manhattan sex-trafficking trial on Tuesday, with testimony that’s poised to be a tell-all accounting of his alleged pattern of abuse. Here’s what to know.