It's no surprise that when the portals opened up, Earthlings and Equestrians would cross over to meet their neighbors. For Stone, a man with the worst case of "bad luck", he was offered to help the Pie Family at their Rock Farm.
However, the self-proclaimed "leader" of the farm, Limestone Pie, treats him like dirt. She yells at him all the time, complains about most of everything he does, and always gives him a look of pure hatred.
Apparently, that's just her way of saying that she has a crush on him!