My otaku stepsister masturbates with the pillow in the living room

My otaku stepsister is very horny and likes rough sex at all times. She started listening to music and while she was dancing she sat on a pillow on the couch and started to dance and with the pillow she started to masturbate her small, wet pussy. When he felt very horny he would put his finger in but he would continue dancing on the pillow. That her legs were shaking with pleasure.