UMSO-144 My parents remarried with their playren and my sister who was suddenly made makes me stupid

My father remarried a woman with children and suddenly had a younger sister. This little sister makes a fool of me if I'm not popular. When my parents were away, I came to my head and showed off my proud big cock and had strong sex from Irama. Then my sister became a captive of this big cock and became completely obedient to me.