Sarah had her sexual awakening, in [part 2]( https://www.reddit.com/r/gonewildstories/comments/dfim26/my_girlffriends_sexual_awakening_2/) we had a foursome and I watched her get fucked by another mans bigger cock and it turned me on enough for me to fuck the other man’s wife. We had been having sex a lot more and really getting into it, even letting Mark and Hannah come over again so we could fuck as a group.
I was led into a room wearing a blindfold, my girlfriend Sarah had taken my hand and led me into the bedroom. I laid on my back as she pulled down my shorts and took my already hard cock in her mouth. She begun sucking me hard and fast almost to make me cum straight away, “baby, don’t make me cum to fast” I said almost pleading with her. I felt my orgasm build and I came hard, I felt Sarah’s lips on my shaft as I came so it must have gone on her face. “Oh Sarah, I wanted to fuck you so bad” I said a little bit disappointed, then she straddled me and sat on my cock, still with cum dripping down it she lowered herself down and started riding it. She felt tighter than usual, I reached out and grabbed her tits, they seemed bigger. My blindfold slipped down and I wasn’t fucking Sarah I was fucking her younger sister Katie. My cock was throbbing, worriedly I looked around the room, Sarah was sitting in a chair watching us, fucking herself with the 7 inch dildo I had bought her. She started moaning louder and Katie was now moaning too. “What the fuck are you two up to?” I asked with no reply from either of them.