My brother's wife, who married into my family, is pure, kind, and beautiful. At night, I can hear her lewd moans from her room, and the contrast is beyond my patience. But I saw her. After having sex with my brother, she wasn't satisfied and was comforting herself by herself... Seeing her like that, I got an erection. Seeing that, my brother's wife started to desire me... Since then, after having sex with my brother, she always comes to me and we have creampie sex many times.