My stepsister screaming as she masturbates. I can't sleep because it's so loud while I'm out here!

Did you think no one was home? My stepsister screams as she masturbates. I can't take a nap because it's so loud while I'm out here! When I tried to open the door and yell at her, she said, "Seriously! Electric insertions!" I can't stop my dick from getting erect after waking up, and my stepsister punishes me with sex as part of her discipline!