Give her that saying about; 'doors, hitting, and asses.'
She's probably right about what she feels for herself, but the selfish format it's being delivered on, is pretty immature.
All you can do is control yourself,...I wouldn`t make any promises/threats about the finality of it all. However, I WOULD hold myself to a higher standard of expectation, should she realize she's been a dumbass, and want back in.
Sorry you are going through this.