My sister's friend Mai-chan came to stay at my house. She was wearing an ultra-mini skirt with her panties fully visible. As her brother, I was peeping and secretly taking pictures with my phone, and she noticed it too. She also found my porn DVDs and erotic books, so she knew I was a pervert. Late at night, after my sister and family had fallen asleep, I was looking at Mai-chan's panty shots while masturbating when she quietly came to my room. "I'll show you my panties if you masturbate in front of me," she said with a lewd invitation, wiggling her ass provocatively. So, I pressed my erect dick against her. "Your thing is about to tear through my panties and go inside." Our lust was unstoppable. After stripping her naked, just touching her bare pussy with my fingers made her leak urine. If I inserted my dick, the amount of urine leakage would be immense, and once I pulled out, she couldn't stop leaking.
