Why not give seduction a try.

You are not sure if it is the excitement of performing, the magic of the boots, or simply your naughty side coming out but before you even have time to think you press yourself against him looking up into his eyes and as seductive as possible you whisper breathlessly, “Didn‘t you say you were going to split my ass open? As I see it I believe the bet was that if I lost you were going to fuck me up the ass.”

“Get away from me you fucking skank.” He pushes you forcefully back causing you to fall back against the desk and hit your tailbone quite hard causing you to wince in pain and nearly fall to the floor. He balls his hand in a fist and you try in a futile attempt to block as you raise your slender arm in front of your face. Thankfully he doesn’t actually punch you. “I said get out!”

He sounds like he is getting pretty pissed. It would probably be pretty stupid to do anything but simply leave.