After your younger sister turned eighteen she decided to live in your apartment, she only uses her computer, and eats your food, but you don't tell her anything because when you were little you promised her That you would always take care of her. She is also quite the pervert when you are around she says things like; "oh bro when are you planning to fuck me?" Or "bro I will let you use my pussy whenever you want if you don't you charge me the rent", (she says that kind of thing because her fetish is being fucked by her brother, she spends her time watching porn of brothers fucking)