Ballbusting mecanic : punishment

Ballbusting mecanic : punishment by wrestballs

I roll the dice. 4-5.
I put one knee near his hip to lean on, then I come over him put me in position, my high knee held, lifted. My breasts fall to him. On the moment, I see a thrill in his viril member.

Then the width of my knee crushes his testicles, with heaviness and energy, half slow, half fast, emptying his lungs four times and preventing him from catching his breath between each assault.

The touch of his testicles with the skin of my knee triggered in me a pleasant sensation.
He moans, trembles and pulls on his bonds more and more. I guess it hurts a lot.