My mother said she'd disown me if I vote for biden. Isn't that a little overboard?

My mom is a trump supporter. Like, a huge trump supporter. She asked me who I'm voting for. Before I answered, she said "you better not vote Democrat". I said "what if I do?". She said that she'd stop talking to me. I'm pretty sure that's what disowning means. I told her that I'm sure as he'll not voting for trump. She said that should for for a third party if im not voting for trump, but I feel that's a waste of a vote, because he's obviously not going to win the election. My mom, and I are very close, so im kind of shocked she'd disown me for exercising my constitutional right. I don't want her to vote for trump, but im not gonna disown her for doing so.

My mother said she'd disown me if I vote for biden. Isn't that a little overboard?
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