Due to family circumstances, I ended up sharing a room with my sister-in-law. One day, I was secretly watching and was discovered by my sister-in-law who was sleeping in the next room! I don't know if she was looking through the condom but when she turned around, she was just staring at my cock! However, I've watched a lot of sister-in-law and brother-in-law movies and I could tell that she wasn't lacking in sex either because my brother had been away on a business trip for so long, moreover, masturbating so much that I also wanted to try fucking her pussy once to see how good it was... '' Masturbating just wasn't enough for me and I was greedy for my cock! I saw the most disgusting thing in my life, but instead I had to have sex with my sister-in-law!