Obviously my FI needs to be the one to talk to her but...
FMIL has basically been inserting herself into everything wedding related since day one. Don't get me wrong, she's a wonderful woman and I appreciate her help, but it's getting to the point where she's trying to take on more than she can chew. And then has made reference to what are my parents are doing to help (they, from the beginning said, tell us what to do and we'll do it). She doesn't need to be helping with everything, and I do go to her for some help on stuff I know she's good at, but I think she needs to step back a bit because she's trying to take on too much- there's a lot to get done but she can't do it all, nor do I expect that of her in any way shape or form.
She also has a bunch of friends of hers all wanting to help set up stuff as well, which is great, but ... you know the saying, too many cooks in the kitchen. I only need 2 or 3 people to help me with setting up the reception venue! Anyways, what do we (by me I mean FI) say to her without hurting her feelings? She'll take it way too personally and she's super sensitive.