Sack the maid of honour!!!!

It's your wedding. Your decisions.

Not your sister's, not your dad's. Your decision.

I would tell her to grow up, wear the dress or not be a MoH.

Tell her to get a grip - your paying for it it's your wedding if she doesn't like it she can buy her own dress to attend as a guest, as quite frankly your moh is supposed to take the pressure off not be a childish diva!!!! Phew rant over! X

Wow! Especially hard bc it's your sister. Maybe there is a reason she keeps turning the dresses down? Jealousy? Body image issues? Maybe if you talk to her you could find out, but also have a chance to explain how this is making it hard for you.

I don't think it's fair that she is putting that stress on you so close to the wedding as it is unnecessary.

She is however your sister so I don't think you should 'sack' her as a BM.... tell her that it's your wedding and not hers so you choose the dress.

Your dresses can't be that bad if the other girls like them!!

This!!!! Stop pondering to her! Stop looking for new dresses! She wears the one she originally agreed to! If she doesn't want to then fine! She buys her own dress and gives up her role as MOH!

your wedding, do what you want and don't let her stress you out! Sister or not!

Did she say she liked it when they first tried them/bought them? If so, can't you just tell your dad she agreed to them and you can't change them at short notice?

If not, have you asked her why she doesn't like them? What she does like? It does sound like she's being spoiled, but if it's because they make her feel uncomfortable then I can understand why she might not want to wear it and it is important the BMs don't feel uncomfortable on the day.

If she is still being awkward, then explain to her that she either needs to compromise or you are happy for her to come as guest. what about explaining to your dad that she doesn't like anything and see if he can talk to her for you if he understands she's being difficult (if this is the case)

I've been having this exact same problem with my MOH, she's my little sister as well and I think because they're so close to us it means they're not afraid to have their bridesmaidzilla moments! I completely understand how stressed it would make you feel so close to your wedding though. For me it got to the point where she was saying no to all the dresses I showed her while the other bridesmaids were all really positive. I was ready to sack her too! I sat down with her and had a chat just the two of us and it turned out it was, as other posters have suggested, a body image thing, she really felt uncomfortable in all the dresses and hated the way she looked in anything. We've worked together though and gone for convertible dresses with puffy underskirts so they're easier to wear on the tummy/hips and each of my bridesmaids can wear the dress how they like best.

As other people have said its your wedding and your MOH is supposed to make things easier for you not harder. Have a chat with her and see if there are other issues and if not and the other bridesmaids are all happy with the original dress go with that one.