This was about 12 years ago when I was getting close to divorce with my ex wife. I started seeing a woman that was 37 at a time and I was 30. We were having an amazing sex at her apartment. Prior to it I never had breeding impregnation thoughts, if I was going without a condom I would pull out in time and jerk it until cum would start to splatter on their stomachs. This time was different. As we were doing it, I was on top of her. She was moaning so much and kept digging her fingers into my back. Her legs kept locking me in which I found extremely passionate and I was getting ready to cum. I told her that I can't hold it any longer and that's when she grabbed my buttocks and with one hand started pressing on my anus. I screamed "what are you doing?" And immediately started shooting ropes of thick semen inside her. It was so hot and nothing like that ever happened to me. After that she did not get pregnant, but part of me wishes she did. She never let me cum in her again and we stopped seeing each other few months later. The kink still follows me.