“Sean proposed to me this idea, this sexual encounter her called voyeurism, where he would watch me… [have] sexual activity with another person, specifically another man,’’ the singer told the jury at Combs’ sex-trafficking trial in Manhattan federal court.

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“I just remember my stomach falling to my butt,” said Ventura, now 38, married to Combs’ former personal trainer and eight months pregnant with her third child.

“Just the nervousness and confusion in that moment. … I didn’t have a concept how that would be a turn-on. but I felt a sense of responsibility since he was sharing something like that with me. I was confused, nervous, but I also loved him very much, and I wanted to make him happy.”

Venture described how one of the typical sex sessions would involve “the hiring of an escort and setting up this experience so that I could perform for Sean.

“It just involved watching Sean be able to watch me with the other person and actually direct, direct us with what we were doing,” she said.

Ventura said she didn’t know how the now-infamous term came about.

But “pretty quickly over time, I knew it wasn’t something I wanted to be doing, especially as regularly as it became,” she said.

“Eventually it became a job for me pretty much. … It was something he would want to do. I would have the contact to set it up. … But in the beginning, Sean set it up. He set it up.

“He would bring them up at random times,” Ventura said. “I didn’t know what one would be or what one would turn into.”

She said she continued agreeing to them partly because “again I was in love, and I just wanted to make him happy.”

She said she also was concerned about making Combs angry — with some of their arguments eventually becoming extremely violent.

“He would back me on my head, knock me over, drag me, kick me, stomp me on the head,” Ventura testified.

She said she also was concerned about making Combs angry — with some of their arguments eventually becoming extremely violent.

Asked how often the violence occurred, she replied, “Too frequently.

“Ultimately at that point, Sean controlled a lot of my life. Whether it was career or the way I dress, like everything, everything. And I just didn’t feel like I had much say into it at that time, being super young, naive, a total people pleaser. I didn’t know enough if he would be upset to be violent or write me off,” she said.

This is a developing story. Please check back for updates.