My stepsister fingers her pussy while watching a masturbation video on her PC

My stepsister fingers her pussy while watching a masturbation video on her PC, My girlfriend is home alone and she does kinky stuff when she thinks no one is watching. I caught her on tape watching porn on our couch. That's not all, she was masturbating hard as well to the seemingly steamy video of another girl shoving a monster dildo in her pussy. She fondles her small titties while rubbing her clits and she enjoys the feeling.