Sex with my step brother

The first time I saw my step brother, Eric, I popped a full boner. He was so fucking hot. Curly, blond hair, hazel eyes, nice bod with the perfectly shaped ass. And his package. OMG!!!! I wanted to rip his clothes off right then and suck his balls dry. But he gave no indication he might be open to a little guy-on-guy action. Not at first, anyway.
We had lived together for about a year, sharing the same room, before anything happened. One night, Eric was sitting on his bed, flipping through the pages of a porn mag, all the while rubbing the growing bulge in his skimpy little bikini underwear. I was lying in my bed, a sheet discreetly pulled up to hide my own burgeoning hard-on. I had my face buried in a book, trying not to look in his direction, but not being very successful.
It was around 1 am when Eric put down his magazine and announced he was going to sleep. He asked if I could turn off the light. Wanting to rub one out under the cover of darkness, I flipped off my lamp and pretended to drift off to sleep. I lay quietly, listening to the tell-tale sounds of Eric stroking his cock. Sure enough, though he tried to be quiet, I could hear his breathing quicken, punctuated by almost silent moans.
I figured he was too engrossed in his own fantasy to notice the sounds coming from my side of the room, so I hooked my underwear under my balls and proceeded to stroke my 8-incher while picturing Eric in all his naked glory walking toward my bed.
So engrossed in my own pleasure, I didn’t notice that Eric was really standing by my bed until he sat down beside me and placed his hand on my thigh.
“It seems we have the same problem,” he said, staring at my fully erect cock. He stroked his own dick slowly as he rubbed the inside of my thigh. “Maybe we could help each other out.”
I stammered out a reply. “What do you mean?” I knew I was gay, but I was only 16 and nervous as hell.