I moaned and started raising myself up and down, riding Mark harder and faster. Even as I moaned in pleasure, as I drove myself on and off of my brother's huge dick, I could feel myself getting emotional, how had it come to this? Why couldn't we have always been together like we were back then? Mark whimpered in my ear, and it broke the spell; we could never be because of things like this. Somehow, someway, I always caused those around me pain. Pushing back the tears, I sat straight up on Mark's lap and, leaning back, grabbed the edge of the desk with my hands. Bringing my legs...