A month before the university exam, I asked my parents for permission to go to my brother's house in the city to review and prepare well for the most important exam in my student life. Here I accidentally discovered the secrets of your feelings. I was studying outside the living room when I suddenly heard a strange noise coming from my brother's bedroom, I was very curious, so I crept forward and gently pushed the door aside. It was an adult scene that I had never seen, my brother's hands were gently massaging my sister-in-law's breasts, then he suddenly took out a sex toy and gently inserted it into her vagina, making her so happy that she couldn't stop moaning continuously. Even though I only looked through the crack of the door, I could feel the feeling of happiness and refreshment of my brother at that time, especially the moment he slowly inserted his penis deep into her beautiful little butterfly.