What a bad temper my uncle has. but my cock drips while he fucks my ass.

I've been working at my uncle's house all summer helping him with the paperwork for the company and today is my last day before starting college. he's always been very dry and moody with me and today i want to know why. when i ask him he tells me to take off my pants and come closer that i will understand. he suddenly starts rubbing my cock and he lays me on my back on his table to fuck my ass. what an explanation.