Grow with her cock size

When soft her balls will be the size of basketballs. That’s seems like a good starting point, when half hard her balls will be the size of her bust so yoga balls and finally at full mast she her balls will double the size of her huge tits. You also add a special request, when her balls are at their biggest she can fill an Olympic swimming pool with half a load.

Another prompt comes up asking how productive you want her balls to be, it shows you a baseline of fully recovering after a few hours however you choose that her balls are constantly working overtime so no matter how much she cums she will not be able to empty herself.