I had been living a shut-in life at my family's rural home when my older brother and his wife, whom I hadn't seen in a while, came to visit and dragged me out. At first, I felt forced into it, but I gradually opened up—both mentally and physically—thanks to my sister-in-law's cheerful personality, curious nature, and her slutty body and revealing clothes. Although it seemed like my brother and his wife were in a sexless marriage, she quickly grew interested in my young, energetic cock, even peeking at it while I cleaned the bathroom. When she gave in to temptation and took my cock into her mouth, I became increasingly aroused. While my brother and mother were out, she changed into a slutty sheer camisole and continued our erotic encounter in the kitchen—eventually letting me finally fuck her. After that, I kept pounding her pussy repeatedly in the hallway and empty rooms, thoroughly enjoying every moment.