My biological father passed away leaving a large amount of debt, and us mother and child were forced to live in extreme poverty.A few years later, a man appeared in front of her mother's debt, and the man became her mother's remarriage partner.Just when I thought that we mother and child could finally be happy, my father-in-law got laid off and got drunk.I started to feel disgusted with my father-in-law who drank alcohol from the daytime and swears at my mother.His father-in-law, who didn't look for work for him, forced his mother into prostitution.I was at a loss for words at that fact and advised her mother to break up with her stepfather, but her mother was indecisive.One day when I came home, my father-in-law was holding a video camera and filming her mother's masturbation.Despite my surprise, my father-in-law grabbed his mother's hand and gradually touched my crotch and instructed his son to do it.Her mother dislikes it, but I got erect in her unconsciousness and fired at her mother's mouth.Disgust and guilt, but I felt an indescribable excitement.That night, my mother, who doesn't usually drink, was drinking a lot of alcohol.Her mother muttered a word of apology.I went to my room without saying anything.In the middle of the night, when the door of the room opened, her mother came in without saying anything.