Its not that important or 'vital'

[Edenviolet]

Dcs are bridesmaids/page boy at dsis wedding.

The rehearsal is 8pm on a school night and expected to run for at least an Hour!?
Dsis said dcs have to attend or will not know what to do and she doesn't want anything to be less than perfect.

My dcs are usually in bed quite early and we have other things to attend to with them as well. I've asked could it be a bit earlier/not on a school night or at a weekend to be told no, the rehearsal is based around the work commitments of the wedding party not my dcs.

So, I have said we can't go then. Apparently its important and 'vital' to attend??

Just say no.

It's not necessary. Let her exclude you all, it will be the best thing that ever happened to you.

why are your family not telling her to get the fuck over herself?

on second thoughts, perhaps don't answer that

There has to be a compromise, surely. How about you go for 6.30 before the main rehearsal starts?

You dsis is being U by refusing to find a compromise and then threatening to stop them being bridesmaids.
She's losing the plot....