Further to my last posting 'Wank clubs turns into gangbang', this event happened just over a month ago. Chris had invited us to our usual Saturday wank club at his place, his wife was away again with her sister so me and Mark arrived about 1000 as usual, Dave couldn't make it as he had to work. I arrived on my bike as usual, went in had a drink or two and then stripped out of my leathers to watch the porno Chris had put on the TV. Mark sat there in his shorts and T-shirt, fondling himself. I think Mark is more shy than the rest of us as he usually is the last to strip off. Anyway, I'd been there nearly an hour and was sat between Mark and Chris on the sofa - Chris' cock in my right hand and Marks lips around my very erect cock. Suddenly, we heard a key in the door and two female voices. Chris was as naked as I was and jumped up saying 'fuck, it's my wife and her sister.' Mark jumped up and looked like a frightened rabbit, but he still had his shorts and T-shirt on. I, however, was as naked as the day I was born. In the two girls walked, they both stopped and looked, Chris looked at his wife (we will call her Stella) and she just said 'I thought you were joking!' and then she walked out of the room, followed by Chris. The sister (who we will call Mandy) was in her late 20's, not excessively pretty but still good looking, not slim but curvy, with long blonde hair, she had on a long demin skirt and a blouse. She walked to the chair, dropped her coat and sat there just looking at us both. 'So you two really are a pair of wankers' she said with a chuckle. I laughed and said 'obviously'. She kept looking me in the eye and then down to my still erect cock, which I made no atempt to hide. I sat there looking her over and noticed no wedding ring. I decided that Chris must be in enough shit, so I thought I'd go and see if I could smooth things out. As I started to get up, 'Mandy' jumped to her feet, and was immediately standing in front of me. 'Where you going?' she said. 'To speak to Chris and Stella' I said. 'No you fucking ain't, you sit down' she said as she pushed me back into my seat. She then, stood with her knees either side of mine, resting them on the sofa. I tried again to stand, she pushed me down then moved her knees further on the sofa. I tried again, this time I had to try and move her weight as well, she pushed me back and moved a bit further onto the sofa. This time her long denim skirt was just rubbing against me cock - which was getting harder. She kept her look locked on my eyes, daring me to try again. So I did. This time I couldnt get up as her weight was pushing me back down. SHe moved further forward. 'You aint going anywhere' she said with a smile. She was now kneeling fully on the sofa, straddling me. My cock was being rubbed by her skirt and the feeling as getting me more excited. She looked me in the eyes and said 'what you going to do now?' as she slowly started to push her pelvis towards me in a rocking motion which only caused her to rub against me cock. I moved the skirt which allowed my cock to fall beneath it, my cock was now rubbing against her knickers and everytime she rocked forward I felt her mound pushing against the tip of my cock. I slide my hands on to her knees - no reaction. Then slowly up her thighs - still no reaction. Under her skirt - slight reaction. The finally I reached her knickers, but no reaction. SHe kept the rocking up, but every now and again she'd lift herself and my cock would fall beneath her and as she lowered herself it would push into her knickers as though trying to get into her pussy. As this happened she would take a slight, short breath in. This carried on for a few minutes, then I thought I'd try my luck. I gripped her knickers in both hands and pulled hard - there was a ripping sound and her knickers gave way. 'You fucker' she said 'you'll pay for those' but made no movement away from me. I pulled her knickers out and threw them on the sofa. My cock was now rubbing directly onto her mound. I put my hands back under her skirt and laid them on her naked hips. She carried on rocking back and forth, rubbing my cock. When she rocked a bit too much, I lifted her and allowed my cock to fall into the right position, then as she came down I forced her down more. My cock found its mark and the tip of my cock just parted her pussy lips, then she rose again - teasing me. She had a big smile on her face. I could hear Chris and Stella talking in the other room. but Mandy kept on her rocking. Twice more my cock found its mark and partially entered her. The third time, as she came down, I pushed my hips up and my cock entered her with about half its length - she took as sharp breathe. I pulled her further onto me, but there was no resistance and she sat fully onto my cock. She sat there for about 30 seconds, gently squeezing her cunt muscles around my cock, then she began to rock back and forth again only this time with a greater purpose. Everytime she sat down on my cock, she would squeeze my cock with her cunt muscles. As she was rather petite, the tip of my cock (all 7 inch) would rub against her cervix - something that has always brought me off. SHe kept rocking, my cock kept rubbing. Her breathing was getting heavier and heavier. Mark, by now, had one hand up Mandy's top (which she didn't seem to have noticed) and was rubbing at her nipples and tits and the other hand was rapidly wanking himself. After a couple of minutes. I felt my balls tighten and I knew I was going to cum - Mandy must have felt it as she started rocking quicker and deeper. She then squeezed me around the shoulders, pulling me closer to her as an orgasm rocked through her, just as I shot my load right up into her. SHe pushed down hard onto me, and squeezed my cock with her cunt muscles trying to get every drop of cum from my cock. Just at that moment, Chris and Stella walked in - their faces were a picture. Mandy climbed off me, my cock still very hard and erect and glistening with her juices, picked up the remains of her knickers and walked out of the room. I sat there getting my breathe back. Then Chris said 'Well, Stella was going to ask you to stay, but I see you've already been asked' I've seen Mandy several times since that day, and the biggest news is that she is nearly 4 weeks pregnant. So I'll now get to fuck her with a very swollen belly (a fetish of mine). We have been back to Chris' and Stella's place for several sessions, although she wont let Chris fuck her.