moh dress problems

Just looking for advice or reassurance really! My wedding day is just over 3 months away and I’ve ordered my BM dresses which are due to arrive about a month before the big day (I had to order them quite late on as one of my other BMs had just had a baby). The dress shop has several different styles and I was happy to let my BMs choose whatever style they wanted but they would be in the same colour. My MOH chose a style that only went up to a certain size and when she tried it, it wouldn’t zip all the way up but she said that would be motivation for her to lose weight. There was another option to order a different style that went up to a bigger size and did fit her but she chose not to go for that one. I made it clear that the dresses were not returnable as they were made to order.


Now we are 3 months away from the wedding and my MOH has said that she doesn’t think that she will fit into the dress as she hasn’t lost any weight and thinks she has actually put weight on. She was quite blasé about it and said it’s fine as she can just order a different dress from another company (ordering the other dress which was a size up from the same shop isn’t an option now as it won’t arrive in time for the wedding).
I went BM dress shopping with my MOH many months ago before going back with all my BMs and putting the order in and she did ask around the time if it came to it and she didn’t fit into the dress how would I feel about her getting a dress from a different company in as close a shade to the colour of the other dresses that would fit her. I wasn’t sure what to say but she laughed it off saying if there was one person who could have a different dress it was the MOH. I told her if it came down to it and there was no other option then we would sort something out, but I hoped and trusted that it would all work out fine especially as she then ordered the dress in the style with the limited size. I really thought that would have spurred her on and given her the motivation, that’s what she told me after all. But she’s now told me she’s been eating really badly and it just doesn’t sound like she’s even tried.
Now I just have to wait until the dresses arrive and go from there (maybe a seamstress could work some magic on it) but she seems to have given up and just thinks it will be fine to get another dress. But I can’t help but feel upset over this situation. Equally I feel like a bad friend for feeling this way! I’ve tried to motivate her, suggesting ways where she can eat healthier and I’ve even offered to join a local slimming club with her so we can support each other. I just feel terrible as it’s such a sensitive subject and she has been suffering with her mental health since having her baby 11 months ago. So she understandably has other priorities, and I don’t want to add to her pressures. I ended up telling her that ideally I would love all my BMs to be in the same dress but if it comes to it and she has to get a different brand of dress then we will sort it out. The issue is it may be in a slightly different shade to the others.
I don’t even know what kind of advice I’m looking for here! I guess I just came to vent. But any comments or thoughts would be appreciated as I’m feeling so conflicted right now! I’m disappointed, upset, let down but I feel guilty for feeling all of those things. At the same time I’m questioning whether I’m making too much of a big deal of it, is it the case where it’s just a dress, and it’s not the end of the world if she’s in a slightly different shade?! I don’t want it to come across that I’m a terrible person as appreciate it may come across that way to some, I just want my MOH to fit into her dress and to not have to panic about it!