Sean “Diddy” Combs’ ex-girlfriend, Cassie Ventura, began what could be a days-long testimony in Combs’ sex trafficking trial Tuesday, alleging on the witness stand Combs had subjected her to physical abuse and coerced her to participate in “freak off” sex performances. (Here is a complete list of the allegations against Combs).

Federal prosecutors will begin trying to prove Monday that Diddy turned his hip-hop conglomerate into a racketeering enterprise that forced women to satisfy his sexual desires for two decades.