My sister is abnormally obsessed with me, a siscon girl. But I thought she would calm down once I got a girlfriend—that was a mistake! My sister became jealous and crossed the line that shouldn't be crossed! She relentlessly torments my inexperienced girlfriend with adult techniques. At first, I could handle it, but eventually, I succumbed to nipple torture. Since then, I've lost count of how many times I've been made to climax. Maybe normal sex with her is impossible now!
