This is my first story.
When I was 13 my Mom's best friend came down from New England, she also brought along her hot 14-year-old daughter who has huge breasts. Her daughter and I had been friends for a long time - basically we are cousins.
They stayed for about a week.She was staying in my room. On the last day my Mom, her Mom, and she went out to shop. I went into my room to find some clothes and I found her thong lying on the ground. I picked it up and instantly got an erection from the smell. I couldn't stand it. I pulled down my boxers and wrapped the thong around my dick. I started jacking off furiously with it. It only took me less then a minute to fill her thong with cum.
They walked a few minutes later and my Mom asked me if I was good. I said,'Of course Mom, what would I do?'