I stretched my mouth open as far as I could at your command, though I didn't have to do much work. Your pistoning cock was hammering in and out of my mouth, hitting the back of my throat.

Caught by surprise, I sputtered and coughed a little, tears welling up in my eyes at the reflex.

Concentrating, I tried to breath normally and allowed you to manouever my head, setting the pace that suited you.