Once you, and everyone at the table you were sitting at finished eating their meals, and drinking the milk you were given, you all left the restaurant, and headed back on the road to the cabin. Meanwhile, it began to close around the diner, having all the waitresses to leave through the back door.
The backdoor lead to a city that contained a bunch of barn shaped buildings, which wasn't far for any of the waitress's to get to, as they all entered the apartment ones. Once inside, they disrobed their shoes, undid their hair, and took off their gowns to reveal the rest of their cowtaur form. The one that gave you, and your friends the milk went to her couch, sighing in relieve, and massaging her own hooves after a long day of serving everyone, while still wondering if her milk would do anything.