Movie Information:
My girlfriend’s older sister is a shut-in. Even when I see her occasionally at her house, we barely exchange greetings—she just stares at me with those glazed-over eyes, like the epitome of a social outcast. One day, I accidentally caught her masturbating… Seeing her usually plain-looking older sister’s sexy body—huge breasts, a slim waist, and a massive ass—gave me a massive hard-on! From that day on, we started secretly masturbating together behind my girlfriend’s back!