As Cassie Ventura neared her 12th hour on the witness stand, she told jurors that the threats and incessant sexual demands from her ex-boyfriend, Sean "Diddy" Combs -- as well as a pattern of coerced sex with strangers -- drove her into addiction, exposed her to regular spates of violence and led her to contemplate suicide.

Ms. Ventura, Mr. Combs’s ex-girlfriend, said he threatened to use tapes of their sexual encounters, known as “freak-offs,” to control her behavior.