About a year after I got married I had an affair with my sister-in-law. It started when our family planned a week long get away at Lake Tahoe. A family friend let us borrow their cabin for a week and it was supposed to be my wife, her sister, and her mom and dad. Because of some last minute schedule conflicts and late flights of my in-laws I drove there by myself while my wife waited to pick up her parents. Her sister drove separately as well.
When I got to the cabin my wife told me that her parent's flight had been cancelled and that they would be a day late as they had to book a flight the next day. They ended up being three days late. I shared the cabin with my sister-in-law for three days until the rest of the family came.
During the first day we chatted but kept to ourselves for the most part. However on the second day I heard my sister-in-law yelp from the bathroom.
She had slipt as she stepped out of the shower and bruised her leg. She was completelt naked and it was the first time I saw her like that. I helped her up and somewhere along the line we started kissing. I can't remember exactly who kissed first or why we even kissed, but we didn't stop. I led her to my bedroom and we had sex several times that day and the next.
After our trip we privately met up and agreed we wouldn't do it again, but a month later we met up and I had almost weekly sex with her. This lasted for about three months but then my sister-in-law stopped having her period and we found out she was pregnant.
My wife found out as we couldn't hide anymore. She was furious and consequently we got divorced. My sister-in-law miscarried in the second trimester probably from the stress from all the family drama I caused. She cut off all communication with me after that. Their whole family hates me now and even my family is ashamed of me. I was almost married for two years to a beautiful woman and a very nice family but I wasted it all on an affair with her sister.
It has been a year since I got divorced and I'm still beating myself over the mess I made. The sex with her sister was amazing, but I would take it all back and never do it if I could. Careful what you wish for.