How to deal with overly helpful co-advisor? I have 3 advisors; two are great (main prof and a daily advisor) and one ('Jill') is not. Jill invited herself to my advisor team after coming back to work from a long medical leave and she's ready to Kick! Some! Butt! in the academic arena. The problem is that her help is not very helpful because:

She is not directly involved in research and has little knowledge of my area so her feedback on my work is superficial, nitpicky or just plain useless.
She is often late to our meetings which is annoying and a waste of time for me since the meetings are planned only for her benefit (I speak regularly with my daily advisor so he knows my progress but for some reason we have a weekly meeting with Jill as well).
She is a Chatty Cathy and wants to make the office one big happy family. She's the kind of person who would judge you for being on the quieter side and make it her mission to prod you out of your shell.

I find her presence draining. She on the other hand is DESPERATE to help me and feel useful, so much so that it comes off as patronizing. Basically she treats me like her duckling.
I'm in my final months of writing and I just want to get my stuff done without having to involve her, but I can't get rid of her and don't want to burn bridges. The other advisors seem fine with her. How do I best manage this dynamic without going insane?
Set a meeting with all three advisors, explain you'd like to focus entirely on the writing, and ask whether regular meetings can be replaced with less-regular meetings when you need support.