Aunt Grace

I'm David 42 divorced, I live with my mother Rachel 64 widow since my divorce. Recently my mother's sister Grace 57 came to live with us, her husband Grant had died in a car accident. She sold their home and moved to live us, as there were no family near her. Grace is good looking for her age and as I found out has a big sex drive. Rachel goes out every Tuesday and Thursday nights to play bridge with friends. I was home with Grace alone and she asked if I would like to play cards with her. I agreed and after a short time she suggested we play poker. I've always liked poker, but since my divorce I can't afford to play. Grace then said We could play penalty strip poker, What's that I asked. It's where you bet your clothes and once naked you have to pay a penalty. Okay I said and we started to play and about hour later I had her down to her bra and panties. I asked What type of penalty is allowed, she replied What ever you want to make it anything goes. That's a bit risky isn't it I said. No not at all, we're both adults and we will behave ourselves she answered. Then she bet her bra on a pair five's and I was sitting on jacks. So I raised the stakes and she bet her panties and raised the penalty. I saw the bet and she show her full hand a pair of five's and a pair of nine's. I then showed mine a four and a seven and three jacks. She stood up and removed her bar and panties, as a penalty I had her do a naked dance. Then she got dressed just as Rachel returned home. The next bridge night Grace again asked me to play cards with her and I agreed and we again played Penalty strip poker. This time she lost clothes quicker than on the Tuesday night and again I had to think of a penalty. I wasn't allowed to have the same penalty twice in a row. Grace seeing I had a hard on suggested that she take care of it for me. How I asked, I'll masturbate you she answered. I agreed and removed my trousers a she started to stroke my cock. After a bit she said She would need to lubricate my cock. I said Okay and she went down on me and started to suck me off, I wasn't expecting that. But I was enjoying it a lot and let her go, after a bit I told was about to cum and she just kept sucking and I came in her mouth. Then she suggested we clean up and have a shower together. I was okay with that and while showering I became hard again and this time Grace said You might as well fuck me. So we went to my room and I fucked her. We hadn't finished long went Rachel arrived home. On Saturday afternoon Rachel went off to local markets and Grace and me were alone again. This time she just asked me to fuck her and I did. Every chance we got alone together I would fuck Grace. About a month later I came home from work early due to a blackout, due to a truck knocking down a power pole. I came in the backdoor and I could hear Rachel and Grace talking in the lounge. So I walk to the lounge and found them both naked and having sex with each other. I was shocked at first, but then just watched them go a it. Then Rachel seen me and was upset a bit, Grace just said Don't just stand there, strip off and fuck me and if your good your mother might let you fuck her as well. I didn't get to get fuck Rachel that afternoon, but that night Grace had talked us all into a threesome and made sure I fucked my mother Rachel first. I now sleep with them both and can get all the sex I want from them.