My sister hates sex, but she's actually a natural pervert! My sister is an elite and has excellent grades at school, but she hates men and shows no interest in sex. She studies whenever she has free time. I gave her some erotic aphrodisiac I bought online to try it out, and she started gagging on my dick like a fish out of water, straddling my face and pressing her pussy against my face, so I let her do what she wanted. When the drug took away her rationality, my six sisters were so erotic that even I, their younger brother, was surprised at the naughty relationship I had with them. 6 stories in total.