On the surface, my family is a happy single-parent family, but there is a secret that has always been in my heart: When I was 15 years old, one day, I got up barefoot at night in the middle of the night. I heard some strange sounds in my sleepy mood. I came to the door of my mother's bedroom and found that the door was not closed properly and exposed a crack. I secretly looked in through the crack in the door. I was surprised to find that my mother was lying naked on the ground, wearing an eye mask on her head, socks in her mouth, handcuffed her hands and feet. Her hands behind her were holding a huge cylinder and poking her anus at high speed. Her mouth was also making uncontrollable lewd moans.