Ask her to officially make extra for you to eat erev yom tov.
I’d get pretty peeved if my husband ate my food before the chag. Although I pretty much always cook too much and we wind up with leftovers, I wouldn’t appreciate the anxiety it would cause me to worry that we wouldn’t have enough! Also, many dishes take hours to make, so expecting her to just “make more” is just silly. No one wants more work after working!