My uncle makes me very horny when he starts rubbing his cock with my ass.

Today i start working in my uncle's office. he is going to take care of teaching me everything necessary. when i arrive i notice him weirder than usual and he looks at me with a smile that doesn't make me very funny. he tells me to take off my clothes and since it's the first day i don't dare to disobey him. suddenly i find myself in my uncle's office naked and rubbing my cock. he loves to get on all fours and fuck my ass and i'm horny lost just noticing how he rubs my ass.