Tied up my ex-FWB this weekend and made her watch me fuck her roommate [FMF]

Before I begin, I feel like this always makes stories easier to read. I’ll refer to my ex-FWB as Karen and her roommate as Amanda.

I feel ashamed but also accomplished about this weekend which was suppose to be a simple get together with friends while visiting the town where I went to college. My buddy invited me down for the weekend to watch football and hit the bars with our friends. Friday night we arrive pretty late so we quickly pregame and hit the first bar. 10 minutes being there and Amanda walks into the bar. She was a mutual friend in college and enthusiastically comes over to say hello. I hadn’t seen her since last year when I was visiting their apartment with Karen. Amanda was wearing a red tube top and I tried not to stare at her nipple piercings peaking through her shirt. We chatted for 10-15 minutes and the conversation got to Karen. Amanda confessed to me that Karen has told her about a lot of the details of our sex life after I broke things off with her, specifically how good I was at making her cum. Amanda also told me she used to listen to me fucking Karen when I stayed the night. At this point, I knew it was on like damn Donkey Kong.