Sister In Law Sex

My SIL just came to visit today. She lives about an eight hour drive away and will stay with us through next weekend. After my wife left for work today, SIL asked if I minded if she sunned herself at the pool in the backyard. I half-jokingly said only if you go topless. She said "NP" and went out and took her top off. Nice B or C cups. Light colored nips, just like my wife. I went out and offered her a drink and she asked me to join her but said I would have to go bottomless. I thought she was joking but then she untied her bottom and flashed me some pubes. And said there was more to 'come' if I took my shorts off. What could I say. I took my shorts off and she took her bottoms off. The only thing that happened was mutual masterbation but man was it worth it! I won't show you her full face but here is what she looks like in my backyard. - Anonymous