AITA for asking my cousin if she's sure about marrying her boyfriend?

My cousin left her previous boyfriend 3 months back for her current boyfriend. Her current boyfriend and her are work acquaintances. Her previous boyfriend was honestly a super sweet guy and a marriage type of material man. Anyways she left and that's okay you can't make someone feel something they don't. She texted me today to let me know her current boyfriend and her are getting married. And I told her things seem a bit too fast and if she's sure about marrying him or if they have talked it through. She got so defensive and a bit rude. I didn't say anything back I just wished her well. Now I am thinking if it was even my place to say anything and just congratulate her. she's not talking to her previous girl best friends anymore. I don't know the details but it happened around the time she left her ex. No one wanted her to leave her ex but then again it's not anyone's place to say anything. Where do you do you draw the linein trying to let your loved ones I iw if they're making the right decision or not or just congratulate and move on.

AITA for asking my cousin if she's sure about marrying her boyfriend?
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