I am a bridesmaid for a lovely friend. Another has form for always making weddings about her in some way and stressing the bride out about her appearance before the wedding. This week we decided on dresses and the bride was excited - friend ( other bridesmaid ) has messaged the bride letting her know ( guilt tripping her ) that she will need to diet to feel good in the dress and would have picked something else. The bride loved these dresses, so did all of us and they are a really good option no matter what figure you're sporting. I know the bride would have been gracious about it but I can see this going how it did with our last friends wedding - friend didn't lose any weight despite having ten months to do so ( nobody said she needed to but she bought it up every day including directly to the bride the day before her wedding when clearly nothing was going to change ) and she will inevitably keep going on until the bride gets fed up and tells her straight. When this happened before she told everyone how unreasonable the bride was and as she was so upset about her weight everyone sympathised with her. What I don't want is for this time, our friend ( the bride ) to have the joy of her day taken away from her because our friend can't just shut up for once. Do I need to say to her to rein it in as one of the other bridesmaids or shall I leave it? Fwiw the bride is really lovely and it'll upset her with this friend keep going on. She's usually okay, if not a little immature but weddings seem to make her go crazy. As far as I'm concerned if you're a bridesmaid you should wear a sack if asked to do so and be happy about it or just withdraw.
Yabu - don't say anything, the bride chose her to be a bridesmaid and will have to deal with it if she gets too much.
Yanbu - say something, the bride shouldn't have to as it's her wedding and bridesmaid friend is not being very nice