Who behaves like this at a wedding?

Sorry, but who on earth behaves like this during someone else’s first dance? Everyone else in that room is seated, quiet, and actually watching the bride and groom have their once-in-a-lifetime moment. Meanwhile she’s not even looking at them and doing this really over-the-top, swaying, performative little routine. For once, it’s not the lack of rhythm that’s the most offensive thing here.

It is so attention-seeking and so disrespectful.
It isn’t about you, babes. Where's the manners and etiquette?

the fact that everyone else is perfectly still and focused on the couple that makes her behavior stand out even more.

FYI: This is at Travis’s cousin’s wedding.