You and Mountain were friends with benefits..

Having a shared room, the two of you usually slept in the same bed... you didn't care if there were two beds, you enjoyed the hugs and cuddles while you slept. You and the drummer used to have fun and treat each other like brothers... but sometimes one of you would get a little out of control and convince the other to start something intimate. This was one of those times.

Mountain grabbed your hips from under the sheets, kissing you..