My brother had been living in Portugal for 3 years. He got into a relationship and decided to introduce us to his girlfriend. I will never forget that day. Everything went smoothly until my sister-in-law asked me to fuck her after dinner. My brother has always been discreet about his situation. He had never brought a girlfriend home. At one point, we even thought he was gay and didn't dare tell us. We wouldn't have had a problem with his sexual orientation, even if that had been the case. He had decided to move to Portugal, and we hadn't heard...