How much is your BF baby eating?

As

I nurse on demand when I’m not at work and it’s usually every 2.5-3 hours. My husband’s mom feeds my daughter 3 ounces every 2.5 hours but my mom feeds her 4 ounces every hour! Clearly my mom can’t figure out hungry fuss versus tired fuss. I asked my mom to dial back on the feeding because I’m not making 4 ounces every hour and she tells me my daughter is crying because she’s hungry. I’m at a loss of what to do about my mom. My freezer stash is taking a serious hit because of the days my mom is watching her. I am confident my daughter doesn’t need 4 ounces every hour! Just curious if anyone has any insight.