DD is 6.5 months old. I went back to work 2 days a week when she turned 5 months, and my MIL watches her at our house.
For about 2 weeks now she tells me every time I come home how "she must be going through a growth spurt, she just seems so hungry after her bottle! " I feel like she's trying to say that I'm starving my kid without using those words, and it is serseriously starting to piss me off.
I leave about 20 oz for her to give while I'm gone, and she nurses twice on those days. I realize that she takes more during the day than most, but she sleeps 12 hours overnight so she gets all her feedings condensed into a 12 hour period. It usually works out to 4oz every 2 hours. She also gets 2oz mixed with cereal in the morning, and 2oz in a straw cup with dinner. So she's right in the 28oz/per day range.
On the days she's with me just nursing, she is more than satisfied. I am just able to pump what I leave for her while I'm at work, and I really don't think she needs more. I think my MIL just thinks that every time she's fussy it's because she's hungry. I've been shrugging it off, but today it just got to me and I needed to vent.
No point to this. I've told her repeatedly about paced feeding, etc. Although at this age I don't even think that is the issue. It's just hard to argue over these things to someone offering free babysitting, especially a MIL.
BFP#1 8/3/12~EDD 4/1/13~Natural M/C 9/1/12-9w6d
BFP#2 5/30/13~EDD 2/3/14~Confirmed CP 5/31/13
7/12/13 Hysteroscopy & Lap Lysis of Adhesions
1st Cycle on Clomid Aug '13: BFP#3 8/24/13~EDD 5/3/14
Hoping Third Time's a Charm!!- IT'S A GIRL!!!!
KAYLIE MARIE IS HERE! BORN 5/4/14
All AL-ers welcome in my posts! 
Re: "She must be going through a growth spurt! " *vent*
BFP# 2 3/9/13: EDD 11/12/13 m/c 3/15/13 @ 5w3d
RPL testing shows one copy of MTHFR gene mutation.
My rainbow baby Isaac has arrived!
I would stop leaving 'extra'. If you're that concerned about a possible spill or accident with a bottle you can leave a frozen bag at their house for a legitimate emergency.
My LO is 10 months old and I leave two 4 oz bottles for DC to give him while I'm at work in addition to solids. I also have them a frozen bag with instructions to only use it if they spill a bottle or something similar happens. They figured it out!
Edited: if you go to any BF groups, take her along one time. It might help if she can hears professionals talk about it/ have them answer questions she may have. It may help her be more supportive/knowledgable about what you're going through.
Just because doctors and medical research say something it doesnt mean they r true to her cause she started giving me tastes of different foods at 1 month and we turned out great
God Bless You my Little One
Farida, our first child, born on the 19th of July 2014
Farida, at 8 weeks