Ex told me she wanted to be used

About 3 years ago, me and my gf (ex gf now) were talking and getting aroused. She slipped into her leather pants (I have a massive leather clothes kink) and started grinding on her vibrator. I sat next to her watching. I never really told her my dark fantasy I had of her not at that point I was so horny. I asked her how she feels about public sex. She said honestly she'd do it. I then said could a bunch of random guys gangbang you? I thought she would be mad but she was so horny that she said yes. She said she didn't care anymore. She wanted to go to a sex theater and let anyone in there use her like a slut. She even told me she wanted some women to use her after then men had their fill. Let's just say I fucked her brains out after that