Names have been changed. It was when I was 18, my dad invited me to the Pub to watch a Football Game with his brother, my uncle, and his fiancee. I had not seen my dad for a while and I agreed to come along. We went to the pub near his and met up with everyone and started drinking. After about 9 to 12 pints of beer and the game had finished (our team had won) I was, not drunk but lightly tipsy. I was not a heavy drinker but I could hold it down and not get a hangover. I remember talking to Lisa as the pub was in celebration and saying to her I had a crush on her when I was younger. She is a year older then me. She laughed and said she thought I was cute and had a crush on me too before telling me to come out side with her as she had a smoke. I followed her and next thing I know she pushed me up against the wall and kissed me. Because of the alcohol in my system I kisses back even my uncle could come out at any time it just made it exciting. About an hour or two later my dad took me to his house with Lisa as my Uncle, who was out of it, went home before any of us and left Lisa behind. As soon as we got into my dad's house he went to check upstairs to make sure that his wife (Step Mum) and kids (Step Siblings) where asleep. All the while Lisa had her hand on my cock rubbing it. It was already hard and she was making it unbearable. My dad came back down about a minute later and just said, "Play." Before I knew it Lisa had pushed me into a chair to sit down and got on her knees, got my cock out and started sucking on my cock like it was the last cock she was ever going to have. I moaned and threw my head back as she was amazing. I looked at her and she looked at me and just smiled with my cock in her mouth, pulled her top down so her tits were out and started sucking again. I looked at my dad and he looked at me with a smile on his face. I had a shit eating grin on my face when I looked at him, here was my uncle's future wife and she was topless, sucking my cock like a total slut. And I was enjoying every second of it and did not feel guilty about it. She started to massage my balls for a bit before pulling my cock out of her mouth with a pop and whispered, "Take your jeans off and get on the floor." I smirked and did just that as she took all her clothes off. She stood over me and lowered herself onto my cock slowly making it unbearable before riding me hard. She was incredibly tight and my cock melted into her pussy. I moaned quietly, I needed to keep quiet as I wasn't sure if everyone who was asleep were light sleepers. Watching Lisa's tits bounce as she rode me was mesmeric and made my cock harder. I pulled her down and kissed her and she kissed back hard before moving back up, I started to meet her hips with mine fucking her hard, gripping her hips so I could go deeper. Out of the corner of my eye I saw my dad move closer before standing beside us. At the time it surprised me when his cock was already out, he cock was a bit thicker then mine, and placed it near Lisa's cheek. She turned and looked at him before taking his cock into her mouth and sucking him. I heard him moan and grab her head, as he started to fuck her mouth and he chuckled with a look. He looked at me again and mouthed, "Good isn't she?" I mouthed back, "She is. I don't want to stop." About 10 to 15 minutes later both me and my dad groaned as he came in her mouth and I came deep inside of her pussy, I felt her cum onto my cock as she groaned against my dad's cock as she kept grinding into me slowly. Before she could get up off my cock my dad pinned her down to the floor and started to suck on one of her nipples as I pounced and sucked on the other one while holding one of her hands in place and started to rub her already fucked pussy. We heard her moan and struggle to keep quiet as we sucked as hard as we could without leaving marks. My dad told me my Uncle would know she had been naughty so we had to be careful. After a little bit of teasing my dad got between Lisa's legs so I moved my hand and he roughly entered her pussy as I got near her head and pushed my cock into her mouth. She started sucking me off hard as my dad pounded her, making her tits bounce violently. I heard him say to her, "I forgot how tight your pussy is babe." She took my cock out of her mouth and said, "You should fuck me more often then shouldn't you?" That seemed to get my dad going as he pounded her even harder saying, "Is that what you want you slut?" She moaned louder before saying, "Yes Eddie! I want you and Liam (Me) to fuck me whenever you want!" Lisa was making sure I was getting pleased as she was wanking my cock while speaking. My dad seemed to growl as he slowed down and asked, "What about Terry(My Uncle)?" Lisa had a smirk on her face as she answered, "What about him?" As soon as she said that she took me back into her mouth and sucked on my cock even more and moaning into me loudly as my dad got faster and harder again. I moaned and watched him fuck her and could not take my eyes off how he was fucking her. It turned me on even more and I moved her head making my cock fuck her mouth as she moaned. Not long after we both came again as I felt Lisa swallow every drop of my cum as my dad pulled out of her. She caught her breath and got dressed before leaving to go back to my Uncle's. Before she left my dad pulled her into a deep kiss and said bye to her before I pulled her into a kiss and told her bye as I slapped her ass. She looked at us both and said she wants her boys to fuck her again soon. I sat down on the couch with my dad and he said he had been fucking her since she was 16 (I live in the UK and that is the Legal age of consent.) I said, "Do you care that you are cheating on your wife." He looked and me and said, "No because Lisa is amazing and a great fuck. Do you care that you just fucked you just fucked your Uncle's future wife of two years? She is technically your Aunty." I thought about this for a minute and said, No because she is a great fuck, best I have ever had. His lose is our gain." My dad chuckled at that before speaking, "You defiantly are a younger me."