Maina, my little sister's friend, came to stay over at my place. She was wearing a skirt even shorter than usual, showing off her panties. I had been secretly peeking at her, and she already knew I'd been taking hidden camera photos of her with my phone, as well as being aware of my stash of porn DVDs and magazines. Late at night, after my family had fallen asleep, I was masturbating while watching the panty shots I'd secretly recorded—when suddenly, she appeared in my room and seductively said, "I'll show you my panties, so jerk off right in front of me." Tempted by her words and unable to resist her teasing, wiggling her ass provocatively, I pressed my cock against her. Surprised, she whispered, "Your big cock feels like it's going to rip through my panties and enter me," but our lust couldn't be stopped. I stripped her naked, and just from inserting a finger into her smooth, bare pussy, she became so aroused she started pissing. When I finally thrust my cock inside, the amount she leaked was incredible. And every time I tried to pull out, the flow only increased, becoming impossible to stop.