Once upon a time, in Canterlot, there was a boy who lived with his parents. Along with his parents, he had two brothers and a sister to play with. There was, however, only one room for the children to sleep in, as well as only one bed. Only three plates of food at the table. Four is not equal to one, unless the all share something: a body.
I'm sorry if any themes or plot elements used within this story are similar in any way to another story. It would not be intentional if that happened.