Imagine mobox87's missing children survive from the incident after william afton stab them with the knife. and try to yell call someone else from help. where missing children still struggle to crawling. and they success found someone or any of their parents has noticed.
Actually, that'd be really cool! (I tried, lol TvT)
Well, in my AU I am still deciding that. But as if for now, William is the biological father of Brandy. There is no Afton child that is adopted or foster and there is no step-parents or anything like that in my AU.