Trev just stood and watched as I fucked his younger sister. She was good in fact very good and extremely vocal and very flexible. I loved when she screamed for me to keep fucking her. I banged her for over twenty minutes. I could see that it got Trev all revved up watching the action. That was when I was nineteen, some thirteen years before this event. I had lost touch with both Trev and his sister. Then by sheer luck I bumped into Trev in my local pub. After pleasantries I asked about his sister. It turned out she was now fat and with four kids and another on the way. Was I glad I had missed that. Then Trev's wife arrived at my table. She was hot and I told her so. Tracey just laughed and thanked me for appreciating her. I could see Trev looking upset and even a little worried. I continued to heap praise on Tracey and offered to get her a drink. I bought Trev one as well. Then another and another. Trev was looking a little shaky when I suggested that I walked them home. Trev said they didn't need my help, but Tracey thanked me and said yes please, much to Trev's annoyance. They didn't live far from the pub and we were soon at their front door. It was obvious that Trev didn't want to let me in, but Tracey had different ideas. She said she would make us coffee and went into the kitchen and Trev followed her and I could hear them arguing. During the arguing I heard Trev's sisters name mentioned several times and then Tracey was returning to the lounge with the drinks. She set them down on a coffee table and then sat on the sofa with me. Trev followed her in and sat in an arm chair. We sat talking and I asked what they were saying about Alice, Trev's sister. Tracey came straight out with it and said that Trev had told her that he had watched me fucking Alice and that I used to fuck anything in a skirt. As she said it her hand landed on my knee. Then it slowly slid up my leg towards my cock. Then her hand was on my cock. I reached over and cupped a breast and pulled her to me and kissed her. After the kiss I looked at Trev. This was his worst nightmare and his best fantasy all in one. I could see that he hated what was happening and yet he already had an erection tenting the front of his trousers. Like Trev my cock was now rock hard. Looking straight at Trev I told Tracey to take it out and suck it. She was a little reluctant in front of Trev, but she changed her mind when I pointed out that Trev had a hard on. As soon as Tracey saw it she started to unzip and removed my cock. Then she was sucking it as if her life depended on it. I could see the look of hate and excitement on Trev's face. I by now had removed both Tracey's blouse and bra and was playing with her tits and rolling her nipples around in my fingers. Tracey was moaning with my cock in her mouth. As Tracey enjoyed my cock and her tits, I put a hand down inside her panties under her skirt. Trev looked daggers drawn at me, but didn't move to stop me or Tracey. It was time that I got more than a blow job, so I stood Tracey up and removed all her clothes and then mine. It was now that Trev spoke and said, "That's enough, time you went home." I told him I would go when Tracey asked me to. Tracey never uttered a word as I lay her down on the sofa and started to lick her wet pussy. I heard Trev groan in his upset and Tracey groan with pleasure. I kept on licking for some while until Tracey shook and then stiffened up as her body was wracked by a seriously big orgasm. I waited until she had calmed down and then moved her into the doggy position with her pussy pointing straight at me. I looked over to Trev and saw that he was now massaging his erection through his trousers. I told him to come over and pull Tracey's arse cheeks apart. At first he said no and then after Tracey pleaded with him he reluctantly came to her and then did as asked. Tracey groaned, I think from knowing that her husband had just offered her pussy to me by splaying her pussy open more than it already was. This was my cue and I moved forward and Tracy groaned again as my cock touched her pussy lips. Trevor also groaned, but that only encouraged me to push forward and part Tracey's pussy lips further as my cock plowed into her pussy. Tracey was groaning with every thrust and was getting close to another orgasm when Trev suddenly shouted, "Stop. She's not on the pill." I looked at Tracey who looked around at me as I had stopped thrusting. "Don't stop. Fuck me." I told her I didn't want to get her pregnant. "I don't care just fuck me," she insisted. I could see that Trev was almost in tears as I started to thrust into his unprotected wife again. Trev was now pleading with me to stop and Tracey was doing likewise to keep going. Then she came and I continued right through her orgasm and she calmed for a few moments and then she was building towards an even bigger climax. I was going with her and told her I would have to stop or I would fill her with my cum. "Don't you dare stop. Fuck me. Cum in me, yes cum in me," she insisted. It was too late anyway as she rattled into her body shaking orgasm and I blasted my cum deep inside her pussy. Then we were collapsed on the sofa and I could hear Trev crying into his hands. Then he straightened himself up and said," You may have got Tracey pregnant. You came in her. I told you not to." I told him congratulations your going to be a father and laughed at him. Tracey had recovered and was apologizing to Trev for letting things go so far. She said she had only meant to tease me and Trev and fool around a little bit, but it felt so nice she just couldn't help herself. Then she see that wet stain in the front of Trev's trousers. It was clear that he had gotten off on watching Tracey getting fucked and perhaps bred. It was now she decided that she wanted more of the same. Tracey was on the floor sucking my cock again much to the displeasure of Trev. Tracey ignored his pleading to stop and kept going until I was hard again. Then she climbed up my body and offered her tits to my mouth. Then she was raising herself and lining my cock up with her pussy with her hands and sitting down on it until it was completely buried in her pussy. How she could ride a cock. She was pounding herself on my cock and making circles with her hips as she rode up and down. All the while Trev was asking her to stop. Tracey had other ideas and was on her way again and even an army couldn't have stopped her. Then it erupted inside her and I felt her pussy clamping down on my cock as she thrashed about above me, ripping her tits from my mouth. Then I was coming to and stiffened as I thrust and shot string after string of spunk into her unprotected pussy. Trev looked mortified at the two of us, but it was clear that the stain in his trousers had now got significantly larger. I was bushed and redressed as Tracey put her clothes back on. I said something like, "Until the next time," to Trev before Tracey gave me a final kiss and let me out the house to go home. A week later Trev and Tracey were back in the pub and she came straight over to me and whispered that Trev had insisted that she went on the pill. I could see the excitement in his eyes. I also knew that Tracey would have to go over a month to be safe from getting pregnant, so was surprised when she asked was I coming home with them for coffee.