Suddenly, I got a cute and stylish sister-in-law, and we started living together, which I was not used to! But my sister-in-law's loungewear was too extreme for me, and I got an erection as soon as I was with her! I tried to hide it so she wouldn't find out, but my sister was worried and just lightly touched my dick and I came immediately. I was so sensitive that I had premature ejaculation. When I felt ashamed that my semen was leaking out of my clothes, my sister suddenly took off my pants, took my dick in her mouth, and said, "I'll cure your premature ejaculation"...!