With each brutal thrust of his massive cock into my tight ass, my boss's grunts of pleasure echoed around the empty office. His rough hands gripped my hair as he took me roughly from behind, pushing my bound wrists above my head to expose my quivering, needy breasts. My moans of pleasure mixed with pain as he relentlessly pounded his huge cock deep inside my ass. In just a few minutes, I felt his climax building - a warmth growing between my legs. Then, with a final, powerful thrust, he filled me up, leaving me weak-kneed and completely satisfied. As he pulled out of me, his hot seed leaked down my throbbing ass crack, marking our forbidden encounter.