i was looking up how many songs areabout springtrap and i see this here i cop pasta it Why did William Afton kill his wife? William didn't intend her to be turned into Baby when she was, his process wasn't perfected. Perhaps the nature of her death, or some corruption caused by Afton is the reason behind their killing. Ballora is just another funtime animatronic like Funtime Freddy and Foxy.