Coincidence or not? Is she trying to ruin my plans with him?

I’ve been talking to a guy and we have planned to meet in 2 weeks ( he’s currently on a work trip so we can’t meet right away).
My friend who has thrown at me shady comments about me and him knows about our plans. She has seem little jealous in the past I don't know why. He’s very handsome guy tbh.

yesterday she sent me a message asking if I can attend to her little sisters birthday party ( same weekend that I’m supposed to meet my guy).
If I say yes I can meet this guy on saturday….
Coincidence or not? Is she trying to ruin my plans with him?
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