My sister is a super slut and a super sadist! I can't resist her, so she attacks me in all sorts of ways every day to satisfy her sexual desires! She restrains me while I'm sleeping and inserts herself without my permission, sneaks into our classrooms even though we're in different years and gives me handjobs, and even takes a bath with me and gives me a titty fuck. She does whatever she wants! Even on the day my girlfriend comes to visit, she doesn't care and cheats on me! It's a forbidden relationship, but I'm a super masochist, so I get excited and can't refuse!