If he's your boyfriend, he can't "disown" them because he doesn't "own" them; he's not family.
It is very difficult, if you are sensitive.
you gotta disown that truck
He decided to disown his irresponsible brother after years of disappointment.
One sentence using the word disown could be: "If you don't raise my grandchildren "properly", I'll disown you!"
I would disown my son if he were a murderer.
The only way you can disown a wolf is to kill it.
Nothing like that has ever been mentioned on the show. Christine's family is also polygamist so chances are they did not.
It would be best to consult with a family law attorney in your jurisdiction to determine the specific legal documents needed to disown your adult child. The process can vary depending on the laws in your state or country.
You cannot legally disown a family member. It's important to talk to a trusted adult about the situation, such as a parent, teacher, or counselor, who can help address the issue and provide support. Consider setting boundaries with your half-sister and seeking help from a professional if the behavior continues.
You cannot disown inheritance, but you can refuse to accept it. This is called renunciation or a disclaimer.
Your mother is not considered a natural heir, as you are expected to outlive her. And there is no need to 'disown' a child, you simply have to name them and say they don't get anything.