GF didn’t realize her strength!

So my GF and I have been together for a while, and a few months back I told her about my Ball busting fetish. She wasn’t weirded out by it which was awesome. She also has some fetishes too which we’ve explored a little bit.
Anyways, we really like foreplay. Sometimes to the point where we just do foreplay until we’re both satisfied. This was one of those nights.
I was rubbing her clit from her side while grabbing her boob, she was getting super close, then she grabbed my balls. This was the first time she’d done it, and it had been a while since I talked to her about it. Anyways, I keep going and now I’m rock hard because she’s started squeezing.
Finally, she reaches climax, arcs her back and clenches her fists. One of which is holding my balls. Holy shit. I don’t think she realized how hard she can squeeze!
I fell back, still rubbing her since she’s still orgasming. She squeezes even more, just tightening like a vice. It felt like they were going to burst from the pressure and my cock was so hard it was throbbing.
She finishes and I stop rubbing, but she’s still squeezing. It feels so good I can hardly keep my eyes open. Then I look down at her face and she’s smiling right at me.
Not only was I getting ball busted, she was enjoying it, and that made it even better.
I couldn’t hold it back, I busted pretty much right there. She hardly even touched my cock. Best experience I’ve ever had, pretty much made this account just to share the story.