While My Cousin Slept

I've always enjoyed reading stories here, so time to post myself. This happened when I was 21, I was living with my 4th cousin (she was 18 at the time).

She had a sleep over with a mutual friend of ours, the friend was 20 and female. That night the three of us watched a film in my cousin's room. I lay on the bed with either of the girls laying either side of me, both resting their heads on my chest. As the film carried on, my cousin rolled so her back was to me, but still held in my arms and she went to sleep leaving me and our friend Sarah to watch the film.

As the film carried on, Sarah got a little playful and joked about touching my dick, I laughed and said " you wouldn't dare". She must have taken that as a challenge because immediately her hand went inside my pj bottoms and wrapped around my dick. The response was instant and my hard-on was very much welcome of her hand and she started to move up and down.

"What if she wakes?" I asked Sarah, reminding her that my cousin was still cuddled around one arm sleeping.

She didn't care and gave me a naughty look that said, "let her" and she starting working faster at my dick. The thought of stopping was gone, but the worry about where my load would shoot was real, I was not in any control over where it pointed, Sarah had full control of my cock, but at the same time, I wasn't wanting to shoot a load over my sleeping cousin.

"Run before you cum" was Sarah's reply.

She held onto my cock, working faster and harder, I surrendered completely to the pleasure, freeing myself from my cousin and letting her do whatever she wanted. 

Then the inevitable feeling built, I knew I was going to cum and I knew it was going to go everywhere. She took me right to the edge before letting we go. I  jumped off the bed just in time to cum in my pjs.

I said good night and left. My cousin had no idea what happened - so we thought. I found out a few weeks later that she was awake and listening, letting us think she was asleep so we would carry on...