When my wife and I had started dating about 10 years ago she had just broken up with her long term boyfriend. We were both 21 and juniors in college. Our relationship was exclusive and I have never cheated on her since we started dating. About a month into our relationship she said her ex was coming over to pick up a few things he left at her dorm and then he would be gone. I really wasn't concerned. She said she was over him. He had cheated on her and was an asshole according to her.

Well I went to class and came back and figured he would be gone as she had called me an hour before to tell me he had just gotten there so I figured he was long gone and I would go over to see her. She lived in a suite with a common area and two bedrooms on each side. Her roommates were gone but they usually left the front door opened so I walked in. As I got into her hallway I heard whispering and I knew he was still there. Her door was slightly open so I peeked in. She was straddling her ex. He was sitting naked on her bed and she was only wearing her thong and rubbing her crotch up and down the length of his dick.

I could hear her whisper that this was the last time and he better enjoy it. She then pulled her thong to the side and inserted his dick inside of her. He held onto her ass as she rode him. I must admit that I was really surprised at how turned on I was watching her. Her ass looked so sexy bouncing up and down on his dick and I could tell she needed to do this to bring closure to their relationship. So I did not intervene and watched until they were done. They did not change positions as she rode him until he came inside her pussy. I quietly left and never mentioned what I saw to her but will always remember it.