My stepmom found a dildo in my stepsister's room and made her ride my cock

My stepmom punishes my stepsister by asking her to suck my cock anytime she finds a sex toy in my stepsister's room. I hid a dildo in my stepsister's bedroom and tricked my mom into finding the dildo herself. She then punished my stepsister by asking her to ride and suck my cock while she watched.