We have just returned from holiday in portugal, We had hired a villa on the mountain range in albufuira (close to the golf courses) with my wife and sister-in-law. Just to explain, My SIL and my wife are practically twins facially, but my SIL is tall with beautiful long shapely legs and a great ass, my wife is short and doesn't have her sister's legs but has amazing breasts.... Now I was looking at a week of non-stop girl talk, so I spent a lot of time golfing and left them to non-stop topless sunbathing, talking and shopping. At night I would go to the local bar or watch TV and they would sit and drink wine and more wine. My SIL is going through menopause and kept having hot flushes, The first night she went into her room and put on a long sun dress in hopes that she would be cooler. She kept lifting the dress further up her legs and I suddenly realized that I can see up her skirt and she was not wearing knickers. The view of her pussy was amazing and I just sat and enjoyed the sights and she made no attempt to cover up. They were both very drunk and went upstairs to bed while I stayed down to watch a movie and finish off my beer. About an hour later I heard someone coming down the stairs and it was SIL going into the kitchen to get some water. She came in the room where I was watching TV and sat across from me again showing her fine shaved pussy. I figured I may not get her alone again, so I thought rather be hung for a shhep than a lamb, I told her that I enjoyed seeing her pussy all night. She said she hoped I saw her and that her husband hadn't had sex with her in 5 years and she liked my attention! I showed her the tent in my pants and told her she had my attention!! She said she knew it was wrong but she wanted to be with me. I went over pulled open her robe and began licking her beautiful pussy. With no exaggeration it took about 2 minutes and she came and my face was soaked. She switched places with me and pulled down my shorts and started sucking me. I obviously picked the wrong one for the best blow job skills, she was amazing. She was sucking, licking my shaft, sucking my balls, I was over the moon with pleasure! I told her I was going to cum and she just smiled and kept sucking on it and swallowed every drop!! She said that we should only do oral sex, but I knew I wanted to see what that pussy felt like, so I agreed and went back down on her. This time she lasted longer and began grinding against by face as I licked her. She was going wild and I knew it was time, so I stopped and moved up and lined up to enter her hidden depths, She said no, we shouldn't but I started rubbing the tip on her pussy and she started pushing into me raising her hips. I entered her and it was so hot and wet and she came twice before I cum deep in her hot pussy, she clamped her legs around me and kept my cock deep in her pussy for at least 5 mins as we kissed, finally She said she was going to bed and kissed me good night. I was wondering if that would be it, but in the morning she came down the kitchen and as I was making a coffee she slid up behind me and wrapped her arms around me and felt for my cock she said to me I hope we can do that again sometime soon we will have to get alot more wine and make sure my wife drinks most of it, I replied to her that it was a deal and we could try it again anytime she wanted my cock in her hot pussy, she giggled and told me that talk like that makes her twat twitch. I slid my hand backwards towards her and found that she just had her robe on and my hand found her pussy which as she said was twitching on my fingers i slid my fingers into her and she began to moan......Just as we heard my wife begining to come down the stairs