This happened many years ago. My wife's sister had just got divorced and my wife invited her to stay with us while she sorted her life out. Sister in law is 22 about 5'7 with long brown hair, slim size 8 and lovely pert 32B tits, super legs and nice tight ass. My wife used to work part time from 4pm till 10pm 3 nights a week. Soon after Sue came to live with us she started to be a little flirty when wife was at work. I just laughed things off and tried to ignore her. One evening we were watching tv together, sat either end of a 4 seater sofa. We both had our legs up on the seat and were just enjoying a film. I felt her foot rubbing up my leg but just though she was moving. Then there was definite movement up between my legs and her foot rubbed my crotch, I looked her and she smiled "do you like that" she said. I smiled back and moved my foot up her skirt and on to her pussy and rubbed, " yes I do, do you like this" rubbing hard against her pussy. "mmmmmm" she said and opended her legs. "Maybe we would both enjoy it more if we used hands instead of feet" I said, and I got up and lay down beside her. I kissed her and she opened her mouth and as my tongue pushed into her she sucked it in greedily. My hand between her legs, stroking her thigh, she opened her legs and reached down an unzipped my fly. As my hand reached her panties they were really wet, I pulled the elastic to one side and my finger easily slipped in, then two and then three and she was moaning with pleasure. I felt my cock being released and her hand wrapped around my throbbing cock and she started wanking me furiously as I was finger fucking her sopping wet cunt. She shouted "I'm cumming" and she shuddered as her orgasm swept through her. At the same time I shot my load all over her hand and legs. We lay together for a while kissing and I looked at the clock, it was 5 to 10, Oh fuck my wife was due back. We cleaned ourselves up and she went to her room. More to follow.