Ex girlfriend threatening to spoil my wedding because im marrying a guy by exposing our relationship?

We were just fooling around in middle and high-school. We are both from very devout Christian families and when we got caught I got sent away to Christian conversion camp and she got kicked out by her parents and has fallen in with a super woke feminist lgbtq crowd at college and are always out protesting. She's got the whole blue hair and has stopped taking care of herself. I really love my fiancee and can't wait to start a family.

Why can't she move on.

Ex girlfriend threatening to spoil my wedding because im marrying a guy by exposing our relationship?
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