You guys can change the ages if you would like, it really doesn't matter.
I was at my friends house working on a school project. She is really cute and I have liked her for a long time. Well, the day went on we were joking with each other, eventually we were finishing it up and and I had to go to the bathroom. I was taking a leak and noticed something sticking out of the hamper. I opened the lid and it was a pair of panties. I knew they must have been her's beacuse her mom is a little bigger than her (although hot also).
Here I was, holding her panties. They were light blue, soft and shiny, satin or silk I think. All I knew was that I was getting rock hard. I dropped my pants and boxers and started to jack off with them. I was rubbing my dick with them and just knowing where they had been was making me so hot. I then decided to put them on. I slipped them on, over my cock and they felt so good. I was rubbing my dick over the panties. I was in my own world, so when she opened the door, I didnt even notice.
I heard her say 'Oh my God' and my eyes opened! She was standing there with her hand over her mouth laughing. I jumped up, but the movevment of the material over my dick was too much. I started to cum in her panties and it wasn't a normal amount of cum. It was a ton! I dropped to my knees beacuse my legs just gave out. I tried to talk but I couldn't and just knelt there, cumming in her panties.
When I stopped finally, she stood there tapping her foot on the ground, but she was smiling and was biting her lower lip. She looked so sexy. I kept saying sorry, but she said nothing and just smiled. She said, 'Well, are you going to take them home too?' I said not and asked if I could change. She dropped her jaw and said 'Oh privacy? I dont think so, you jack off in my panties and you ask me for privacy?' I thought she was pissed, so I dropped them, put on my clothes and just ran out the door.
The next day, at home, She dropped by my house. I opened the door and there she was. I thought she was going to punch me. Instead she reached under her skirt, pulled down her panties and gave them to me with a sexy look on her face. She said 'I want those back later, um, with something in them' then she left. We have been doing that ever since.