Big Mac's testicles have grown to the size of watermelons, and Applejack helps him find a cure for his ailment. To his misfortune this leads to a painful adventure of ever-escalating nut shots and low blows.
Warning: This story is all ballbusting and only recommended for the fans of hoof-to-balls cbt.

Kinks included: Ballbusting/CBT/testicle torture, hyper balls, brother-sister incest

Written for the April Incest is Wincest contest.