Borrowing Bride

I would tell her that unfortunately, you had to postpone and won't be able to complete the items until closer to your new date. She can't really get mad that she doesn't get to take advantage of all of your free decor.

As PPs apologize and let her know your wedding is being postponed and that you will not have the centerpieces in time. It would be completely fine if she borrowed after the wedding because you've already used them and probably won't have a big purpose after but since you're postponing there's no reason to get these things done just for her wedding that she is borrowing.

She still has a full six months to plan - that is plenty of time for Decor. If it was like six weeks, then I could understand feeling a small tinge of guilt, but she has PLENTY of time. The important part is just letting her know as soon as possible so she can start to plan something else.

I agree with your fiance. It sounds like she doesn't have an original thought of her own if she wants to use everything that you planned on using for her own wedding. I would kindly tell her that unfortunately the items she was going to borrow won't be available and that you are sorry for any problems this way cause. If you tell her now, she has plenty of time to figure out a different solution.

I'm with your fiance on this one! Suggest that she look at Facebook marketplace

Agree! Why should you apologize? It's not like you had any control over the reasons that you have to postpone your wedding. And as you say: she wasn't helping out with any of it financially or otherwise. You don't owe her anything. Let her know that she won't be able to borrow the decor because you won't be making it until you need it (not when she needs it).

I’d just tell her no, or you can let your fiancé be the one tell her since he was set on no to start with. I do agree with him even in the beginning before y’all decided to postpone. It’s one thing to borrow a few things or buy some of it off of you, but it’s entirely a different story to want to use all of your same things. I like to be unique; I don’t really like when people wear the same thing as me, much less to decorate their whole wedding the same as mine. I already felt a bit weird because I got engaged and am getting married in the same month as one of my best friends, but October has always been the month I wanted to get married in and I didn’t really have much of a say so in when he popped the question (just told I’m I’d say no if he asked on Valentine’s Day). But when people started telling me I should have sunflowers in my wedding because it’s October, I adamantly put my foot down, because she had sunflowers everywhere.

I bought some wedding decorations from a friend’s niece, but I’m not using them the same way she did, only took some of the flowers that matched my colors and using the lanterns in a different way and just making my own thing.

I also think it was very rude of her to ask to use all of your things without offering any sort of compensation for your time and money put into creating them all.