(F4M) The most degrading and sexiest night of my life

Background – I babysat for a coworker of my Moms when i was a teenager. He lived up the street and was married with his wife travelling a lot. We got really personal over the years, spending a lot of time together when he would come home from work. I absolutely looooved teasing him and was usually out on his patio in my bikini tanning when he got home from work. Over time, we got really comfortable with each other and somewhat inappropriately discussed his sex life with his wife, my sexual adventures as a horny teenager, kinks and fantasies, etc. Eventually I turned 18 and we started having pretty regular sex when his wife was out of town, or maybe a quickie when he got home from work occasionally. By this point in the story I'm about to type, we had already explored our kinks and done LOTS of really rough and dirty stuff, but nothing as dominant/submissive as this!!