You grab onto the fence for a bit, as you feel your uncle's bovine tongue lick your butthole enough times for your face to push out into a bit into a bovine muzzle. You could also see a bunch of fur cover your body, but it was a lighter shade of brown than what your uncle had, and you could feel it cover your testicles.
Speaking of that, your testicles backed up, until they were now further away, and expanded, while your hole puckered so much, that your uncle could have an easier advantage at licking you completely. You could also feel your fingers begin to fuse as they were becoming hooves themselves, and you could also feel a pair of sharp horns come out of you as your hair began to fuse with your fur. Just then, the fence broke, as your tails sprouted, and you were finally out of your clothes, while laying down on the floor.