Masturbating on the showerhead was so pleasurable that my brother caught me and fucked me! HUNTA-090

My older sister would go to the bathroom to shower whenever she had free time. I always thought she was just very clean, but actually she was hiding inside and masturbating with the showerhead! This time, she didn't close the door properly and was panting too loudly, so I caught her. My sister, who was about to climax, ended up having sex with me!