She admitted this romp was typical of their wild life together, and she was just as accepting at the time.
She added: "David was big on threesomes with both men and women - the whole nine yards. And I was right in there."
Angie revealed the details of their "bulls**t romance", claiming the rock icon told her he didn't love her when he proposed.
She continued: "It was a bulls**t romance ... He had told me before we married he didn't love me, so of course he was not going to be faithful. As it was the 60s I suppose they called it free love."
The 63-year-old former model also spoke about allegedly walking in on the Where Are We Now hitmaker when he was naked in bed with Mick Jagger.
She claimed: "I walked into the bedroom and David was there with all these pillows and duvets on top of him and on the other side of the bed was Mick's leg sticking out.
"I said, 'Did you guys have a good night?' They were so hung over they could hardly speak. I took pity on them."
- Bang! Showbiz