“She eats what you eat”

Anytime I tell my mom my daughter was gassy at night she always responds with “well what did you eat? She eats what you eat so don’t eat any processed foods!”.

How do I tell her, like she’s 2, that breastmilk does not work like that.

Shes never breastfed a day in her life and knows nothing about it but seems to think I can’t eat Oreos or literally anything that’s not protein and vegetables.

Edit: she’s 15 weeks old

Edit again: I am dairy free due to an intolerance, so I understand certain foods such as cmp or soy can cross over but I’m talking about processed foods. Like she thinks I can’t eat an Oreo without disrupting my babies guts. She doesn’t understand how breast milk works but has an input