It doesn't make sense because the question (and answer) are far too nuanced for a yes/no answer.
For a start, what, exactly, do you mean by 'disown'? That word has shades of meaning. It's not obvious what you have in mind when you write it. That alone makes a simple answer quite tricky.
Do you mean 'go no contact'? To what extent?
And again, depending on the extremity of what she is saying, and your response to whatever it is, then are other options available, rather than an extreme non-contact?
Are you able to go non-contact?
The fact you are asking a question on a forum also suggests that, actually, your question has an ethical dimension - you really want an ethical judgment as to whether her statements are reasonable and whether your response is reasonable. After all, on a simple pragmatic level, of course you are capable of going non-contact. So that suggests you really want to know how a group of strangers judge what your parent is saying.
Simple answer: try ignoring what she says. If that doesn't work, limit contact through time spent with her. If that doesn't work, decrease contact still further.
More complicated answer: if what she says poses a risk to yourself or others, take further, appropriate action.