First Real Orgasm.

When I was 13 and just discovering sexuality, my older brother Rick (15) was going down on me for the first time. I had been giving him hand jobs and I guess we took it to another level. We were in the backseat of an old car dad had parked in the backyard. As Rick was licking my clit, I began to shake and when I started cumming, I actually peed myself. It wasn't a lot ,thank goodness, but I was tinkling as I was cumming that first time...Wow.