Stag Night

Last weekend I went on my brothers stag night and afterwards back to the hotel chosen for us to stay at where I found that it had been decided my brother and I would be sharing one of the twin rooms booked.
At 5am I woke up and within moments was rock hard thinking about the ladies we'd seen earlier that night when I glanced over at my brother who was lying asleep with his back to me. I reached beneath the covers and took hold of my cock and without making any noise slowly pumped my cock, amazed at how turned on I was masturbating three metres away from my brother!
As I started to feel the tingles increasing in my cock as my orgasm approached I pinched the base as hard as I could with my left hand and had to really force myself to stay quiet and still as I had a huge climax staring at my brother just wishing I'd had the guts to wake him and ask for some help.