Sitter takes food?

We recently started house sitting with a great sitter for our small dog. We think she is great, she clearly loves our dog, sends so many pictures and videos and our dog is clearly happy and comfortable with her. There is one thing that has slightly weirded us out - she eats our food. For context on this: we asked before she started doing house sits for us what would make her comfortable. I asked for any sort of food items / drinks / coffees etc she would want and purchased them in advance of any time she would do a sit. I told her she was welcome to all of these items and left them in a specific part of the fridge / pantry. She never touched any of them and actually told us specifically she would go back to her apt (around 3 blocks away) for lunch and dinner for herself and to visit her cats. We meal prep a lot of freezer meals and other items so these were pretty much the only other things in the fridge. On her last visit, I saw on the ring doorbell that when she left, she took a freezer bag with most of our prepped meals with her. I’m sort of at a loss for what to do because she is SO good with our dog and have no issue with providing her food for her stay but it feels odd to us that she would specifically take these which we implied was sort of “off limits” and not anything else that was asked for. Maybe I sound too type A but it’s not even like these meals were particularly good - mostly frozen soups and random stuff like that. How would you approach resolving this? Is that too big a red flag?

Edit/update: I asked her if she took anything from the freezer and initially she said no. I didn’t respond but she texted me a few hours saying yes, she did take them but only because she thought they were expired. (They have tape on the top with date we made them, tho it’s not the expiry). I hadnt asked her about the other household items but she was upfront about it in the follow up text and say she did take some stuff with her (packs of dawn / sponges, dryer sheets) but was planning on buying them and replacing them on her next stay. She was clearly very embarrassed and apologetic about it all and while I think it’s a bit dishonest and def a faux pas, I won’t report her or anything others were suggesting. She’s young and made a stupid mistake; I can’t say I haven’t done the same and she really is very very good with our dog so maybe I’m stupid but I’ll keep the next sit with her as well we’ll see 😂. I don’t have any explanation for why she didn’t take the other requested stuff. My best guess is the freezer stuff was more non perishable and could help out with Meals at home for her longer term.