Grab him by the balls!

Before even fully forming your plan, you reach underneath yourself and grab Sam by his dangling ball sack. You squeeze, hard, and he stops what he was doing as he screams out in pain. "FUCK! LET GO OF ME YOU FUCKING CUNT!" But of course, you hold on tight. "Stay still," you order him, "or I'll tear these fucking things right off!". You squeeze him even harder to make your point fully understood, and he stops moving, still whimpering. "Get your hands off me!" you shout, and he immediately complies, though his barely-covered cock is still inside of you.

You briefly weigh your options. If you let go of him, he can surely overpower you. But you have to let go of him at some point. And besides, this kind of asshole is exactly the kind of owner you want for Mandy, he's just too bad to pass up. "Keep fucking," you tell him, "and don't get your hands anywhere near that condom again!" "Are you crazy? I let go of you, now you do the same!" But you keep your hold of his balls, though not squeezing quite as hard anymore. "I still need your cum, asshole. Once you fill that condom, then you can leave!" Sam's cock had gone half-limp due to the pain, but he resigns himself to your orders and starts slowly fucking you again. Eventually he his fully hard again, but he is still moving slowly, afraid that any sudden movements will make you castrate him.

For your own part, filled with rage as you are, you barely feel any of it. You just fling insults at him as he continues obediently fucking you. It takes a long time for him to work his way towards his orgasm under these conditions, but eventually he pushes deep into you and grunts as he fills up the condom.

Ok, that's as far as you had planned. He's probably a bit distracted by his waning orgasm right now, so you think you have enough time to get away. The question is, do you have enough time to snatch your hard-earned prize from his dick?