u/lillylotss

AITA for refusing to be in my dad’s wedding and telling him his fiancée is using him?

I (18F) am in a really tough spot with my family right now. My parents divorced three years ago after my mom cheated. It was messy, but my dad (52M) seemed to move on and started dating “Sarah” (38F) about a year and a half ago. They’ve been rushing into marriage… the wedding is in six weeks.
Here’s the thing Sarah has been weird to me from the start. She constantly makes little comments about how my dad “finally has someone who actually supports his career” (unlike my mom), pushes him to spend tons of money on her, and has been asking him to add her name to his house and savings accounts already. A few weeks ago I overheard her on the phone telling a friend that marrying him would “finally let her stop worrying about bills” and that she couldn’t believe he was “this easy.” She also badmouths me to my dad whenever I’m not around, saying I’m “too attached” and need to grow up.
I sat my dad down and told him I wouldn’t be in the wedding (he wanted me as a bridesmaid) and that I think Sarah is using him for financial security. I showed him some of the texts she’s sent me that were rude and the screenshots I have of her Instagram where she posts about “securing the bag” in a way that felt pointed. He got really angry, said I was being a bitter child who doesn’t want him to be happy and that I’m just like my mom. Now Sarah is playing victim, crying to everyone that I’m trying to ruin their relationship. Half my extended family is mad at me for “causing drama” right before the wedding, while the other half is quietly agreeing with me but won’t say it out loud.
My dad told me if I can’t be supportive then I don’t have to come to the wedding at all. I’m devastated because I love my dad and we’ve always been close, but I feel like I’m watching him make a huge mistake. AITA for speaking up instead of just smiling and staying quiet?

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u/lillylotss — 11 hours ago