What!?! I thought teachers ate in the "Teacher's Lounge". I've never heard of teachers eating in the library and I actually thought food and drink was frowned upon in the library no matter who it is that has it.
I agree there should be a better place for you to go where you are not on display nor interrupted.
That being said - it sounds like at least the principal is trying to accommodate you, but maybe she/he should have informed the staff better. You don't want to burn this bridge, but maybe ask if there is a more conducive space for you and your DD to go.
