Help! My FMIL is incredibly kind and loving, and super involved. She is also suppperrr pushy with opinions, asks extremely detailed questions about the wedding, wants to talk about it all the time (so I can't just not bring up the wedding or keep changing the subject - she's relentless). The problem is that, she'll ask what we are doing for xyz, I'll tell her, or tell her we haven't decided, and then she'll poo poo and criticize EVERY decision we've made (she seems to think her son hasn't been involved with every decision - he has been for 98% of decisions). Anyway, she has NO sense of boundaries (she calls our reception venue, the hotel we booked blocks at, our pastor, on and on and on). I've tried hard to establish them - for example, she asked for who I'm working with to establish the hotel block and i said "Oh I have to contact them today anyway, what should I ask them" and when she pushed I said "the manager is difficult to get a hold of and things will go smoother if it's just FH and I contacting him". So it's not for lack of trying.
WHAT do I DO while keeping the peace??? Please help.
ETA: She's not contributing financially to the wedding.