Simple. Tell her it's your wedding butt out or don't come. You have planners and don't need her interference. It's your day not hers

You better tell that woman .

And that's why you pay for your own wedding. If you are politely tell her to back off. If not, suck it up and meet with the planner alone.

Time to get out the contract with the planner and remind them who is paying for their services. Hint: it's not Mom!

Oddly that sounds a lot like how my mom is acting right now. Except that my boyfriend hadn't even proposed to me yet. :/

YDU for not saying something at this point. Her behavior has obviously gotten out of hand and of it bothers you, you need to say something.

My mom does that with my son. She always says "this is my baby... I mean my grandbaby" I'm slightly afraid to leave him with her on account of kidnapping..

tell her to piss off, its your wedding, you have that right

Tell her, "Look, I'm the one who gets to quit giving ******** here not you!"

Sometimes you need to know when to have that little bit of rage to make people understand. This is that time!