(Get into the following position if you can)
She position you so your legs are over your head, stands over you and puts her strapon to the rim of your ass.
"Beg boy, beg for me to penetrate you with my cock again slave!"
*Evil grin*
"Good boy", she says as she pushes her cock all the way in.
"Now you might be wondering why I have you upside down holding your cock in your face." She start to slowly stroke your cock.
"Well thats because as soon as you get to the edge I'm going to make you ruin it and yes slave it will be going on your face so open wide!"
Fuck your ass hard and stroke your cock until you reach the edge, then as soon as you start to cum stop and let it just drip out onto your face.
"Now get to the next room I'm bored with you."