Description: This summer trip took a turn. My sister-in-law, my stepson, and I were soaking up the sun, sitting by the pool. Thats when she told me about having an affair and how fun and exciting it is to be a cheater. I was shocked, but extremely turned on. She wanted me to be a cheater, too I wasnt sure I could commit to something like that, but then she said what if we made it girl-on-girl? Kept it a close secret. The temptation won, and she and I snuck off to fuck in the shower. Id never been with another woman. Getting eaten out and fingered by my sister-in-law It all felt so wrong, so dirty. But it was a sensation I needed. Never in a million years did I think wed get caught by my stepson. He didnt know what to think, but one thing was certain, if we wanted him to keep this a secret, hed have to join us