Guest dilemma

I think you have to just let it lie. I'd feel the same as you! It's a dilemma. But as an outsider I think it's best to say nothing. Have her to the day and let her bring the bloke to the evening. She might come back to ask if he can attend all day - be firm and say no. If you're lucky she might switch to evening only herself.

You can't really un invite her sadly. Honestly, you'll barely notice on the day whether she's there or not unless you let it get under your skin so I would just chalk it up to experience and let it happen. Make sure you're very clear on what time her OH is welcome from, and then try and let it go. You'll have more important things to think about on the day, I promise

I wouldn't uninvite Her. That would be rude especially after you've just agreed to have her OH. You won't even notice she's there on the day as you'll be too busy having fun.

I dont think you can uninvite her. Just suck it up, forget about it & dont let it worry you anymore