Riley

You are sitting on the couch with your 18 year old stepsister cuddles in watching a movie, lower halves conver in a blanket. Your Mother and Stepfather are sitting on the other side of the couch. As the movie goes on, you feel your stepsisters hand slip inside the opening at the front of your boxes and take your dick out and starts stroaking. She glances at you from the corner of her eye and raises a finger to her lips, shushing you and she continues. After a few minutes of stroking your cock, she stands up, stretching in front of you so you get a perfect view of her firm body, says she is tired and leaves for her bedroom down stairs, keeping eye contact with you as she leaves.