My girlfriend and I flew half way around the country to get to Denver, Colorado where her younger step-brother, Kyle,¬ has lived for a while attending college. We spent several days together seeing the local sights, Rocky Mountains and having a good time together.
Most nights, my girlfriend and I fucked in their guest room and we heard her step-brother and his girlfriend doing the same thing in their bedroom. Thin walls and could hear the bed springs bouncing and every moan. Happened the same way the next night too!
Both the step-brother and girlfriend weren't shy about going nude to their bathroom the first morning after hearing them having sex. She had a good body, but thought he was hot and fit. With a nice low hanging dick.
I liked what I saw and tried not to stare too much. He did catch me checking him out and just smiled. My girlfriend and I also went to the bathroom nude the following morning. Both of them checked us out! Which of course quickly became a hot erotic four-some!
