Katie knows she shouldn't be enjoying this as much as she is. It was wrong. She wasn't even human anymore. Her body was covered in unnatural hair and she was standing on hooves instead of feet. And despite that, all Katie could think about was the stallion pounding her female slit.
Outside the shop, Josh is trying to open the locked door. He couldn't see anything, but could hear EVERYTHING. Whatever was going on inside, it sounded very intense and passionate. In the front of his pants was an obvious boner. Josh can't help himself, he slides his hand into his pants and starts stroking his length.
A series of deep moans echoes in the background from the shop. Katie has bent over a table to allow the Shopkeeper to really start plowing her. Again, it was so wrong but felt so good. Her horse pussy was being stretching to the max by the Shopkeeper's thick horsecock. Katie was vaguely aware of the fact that aside from the fact that she was standing on two legs with hands, her body was entirely equine.
The simultaneous orgasm of Katie and the Shopkeeper could be hear throughout the mall (but of course it was empty at this point). Save for Josh, who was sitting outside the shop masturbating furiously. The full moon effect hit him too. Granted it didn't turn him into some kind of animal anthro, but it was making him a lot hornier.
Josh gasped as he came, sending cum flying onto the floor in front of him. Inside the shop the two horse creatures continued to fuck until dawn, when their changes started to recede. At which point they would discover Josh, passed out in front of the store, covered in dry spunk.