Alright, let me preface this by saying I'm not asking if this would make other people uncomfortable, but how to address this.

I'm pretty private about breastfeeding. If I am at a friend/relatives house and the baby gets hungry, I feed her in another room. I have never mastered the cover, so this works best for both of us.

Anyway, my MIL is constantly asking me questions about bf and they make me uncomfortable. For example, I take the baby into a back room to feed the baby at holiday gatherings and (without fail,) she always asks if the baby was hungry in front of everyone when I return. It's like "no, I was rearranging your bookshelves. 🙄.) I've tried ignoring her to see if she gets the hint, but she just asks again. She asks if the baby eats a lot or if I am pumping for work and these are questions that all around make me uncomfortable more or less in front of my childless BIL.
She bf both kids, so it's not like it's about bf education and there might be a slight BEC factor there. I'm sure she's just trying to make conversation, but I wish it were about topics that didn't involve my boobs.
I realize this might make me an outlier and I am ok with that. so how do I approach this politely? She does a lot for our family (by her initiative) and I dont want to seem ungrateful.