Sister

You can't control what your mom does, but "no" is a complete sentence when she asks you. I would honestly just tell her to let it go for now. The wedding is awhile away and she may change her mind again 16 times. If she wants a new dress, she can save up money little by little for a new one. If she's married, I'm assuming she's an adult. She can make her own decisions.

If your mom wants to buy her a new dress then that's on her but I would simply tell her no. If she wants a new dress then she can buy one herself

That is incredibly selfish of her... so sad. Just tell her no and move on!

I agree with the first post here - "No." is a complete sentence. You don't really need to say anything else. Just ignore her pestering you over it. Also do not provide reasons why not, people like her use reasons as an excuse to argue (they will grab onto your reasons and try to explain why it's not a good reason). Just saying "no, nope, can't do it" leaves them with nothing to work with.

Totally agree! No means NO! If she wants a new dress then she can buy it.

I am generally of the opinion that buying BM dresses early is a mistake. It is so far out, and too many BM treat it like Play money. The usual time is to order 4 -5 months out since they come in 2-10 ( some 12) weeks after order. So once measured and fit, people have less time to change weight, already know if they are pregnant, and don't have that sense, there's oodles of time, so if I do something and regret it, I will just get another one. .... Depending on the brand, she has til the beginning of March or April to get a new dress. Don't even listen to pleas. She is an adult. She gets the dress, and shows up groomed and dressed in
early August, or she is a guest. Will someone bail her out ? No. You have your own expenses.

I agree with others. Tell her no and let your mom do what she wants.

Put your foot down with everyone. If they don't like it, sister can be a guest instead.

The dress is altered in what way? Is it still wearable?

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My sister had it altered to properly fit her. It was way too long as she is on the short side. She also had it take in a bit as it was a little too loose.

View Quoted Comment Oh! Ok. I thought maybe she altered the style of the dress.

You obviously can't control what your mom does (though I'd advise her to not help at all, it's not fair), but just flat out tell your sister 'no' and if she's that upset then she can be a guest instead. She got her dress (that you obviously approved), had it altered against your advice, and now needs to deal with the consequences. Your wedding is in August she has time to save up if she really wants a new dress otherwise she needs to deal with it.

View Quoted Comment I agree with this.

Tell your mom what is going on and let your sister know she knew there wasn't no wedding til Aug of nxt yr she made that choice to get it alternated be4 time so now either she make the choice to purchase a new dress or loose weight. She knows your circumstance and it's not fair to you or your mom for her to put any guilt on yall