I think everyone is misunderstanding the "kids" part.

The daughter is a teacher, meaning she has "kids" (i.e. in her classroom), but not "real kids", as in, kids of her own. A strange way of saying it, but I'm sure that's what she meant.

The no real bills part... that could mean anything. If she's living with her folks and doesn't have to pay rent, utilities, etc., then I can understand how a request like that could be taken poorly by the mother.

Still, posting it on social media is Karen-like behaviour.