Disowning isn't a full denial of familial relationship. It is equivalent to excommunication by the Church of the unrepentant sinner, whereby the unrepentant sinner is cast out of the Church and denied it's protection and benefits, all meant to bring that sinner to repentance.
I wouldn't foot her bill at university either. But I wouldn't disown my own flesh and blood unless they posed a danger to me or my family.
Disowning isn't a full denial of familial relationship. It is equivalent to excommunication by the Church of the unrepentant sinner, whereby the unrepentant sinner is cast out of the Church and denied it's protection and benefits, all meant to bring that sinner to repentance.
Reminds me of the South Park episode with the "gay" dog.
"Sit Sparky. Stay Sparky!. Good, now....don't be gay! Don't be gay Sparky.
Sounds ridiculous with humans too.