My sister’s flirty comments to my fiancé are getting out of hand.

We’re a few months away from our wedding, and I honestly thought the biggest stress would be seating charts or vendor delays. I didn’t expect the problem to come from my own sister.

She’s always had a bold personality, but ever since we got engaged, something feels... off. The way she talks to my fiancé makes me uncomfortable compliments that go a little too far, late-night texts that don’t need to happen, and these “jokes” that are clearly not just jokes. Recently at a family dinner, she laughed and said, “If you ever mess this up, I’ll be first in line.” Everyone chuckled except me and him.

I’ve tried brushing it off, assuming she’s just being playful. But deep down, it’s starting to feel like toxic sibling behavior and it’s making wedding planning way harder than it should be.

I love her, and I don’t want this to turn into something ugly but I also don’t want to keep ignoring something that’s making me feel hurt and disrespected. I’d really appreciate some honest advice from anyone who’s dealt with jealousy during engagement, inappropriate family dynamics, or anything that felt like a betrayal wrapped in a smile. How do you move forward without burning bridges or yourself?

I'd be direct and tell her to cut it out. Don't explain, don't defend. Then enforce that boundary. Forever.

By the way, SHE would be burning that bridge, not you, by defending against that behavior.

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