thoughts?

I'm not sure if I'm upset or annoyed, i don't wanna jump to conclusions but I live with my bf and his parents house and we get wic baby food so I put all her baby Gerber in the fridge. they give us regular Gerber and this two pack flavour Gerber kind of thing. my baby eats them real slow and I sometimes feed her what I can but I went into the fridge to get milk and I saw all the gerber jars gone except the two packs. I was confused and thought someone had thrown them away. I started looking threw the cabinets and couldn't find them. there was no way my bf would ever throw them. I went upstairs to check and they werent there. I went back downstairs and checked the cabinet where I leave the baby scrubber and saw them there. I believed it was the mom since they still felt cold and they weren't there a few hours ago nor was th3 dad home. I got annoyed to why she put them there or why she didn't bother to ask us if it was okay. it wasn't like she made space for anything because they don't buy groceries. we only have milk that I always buy and cheese/tortillas and eggs. I know we can keep them out since they are put on shelves when u buy them but the reason why I put them in the fridge was because it gets so hott and musty in the house. they don't want to pay for a.c. or anything so the kitchen gets hott and I didn't want them to go bad (they were really run down once when we left them in our room). But now it's getting cooler since fall is coming im just kind of upset to what made her want to move it if it wasnt in the way iknow it sounds silly but I know she's nota big fan of me nor do we have a relationship together. I'm not sure if me putting it back in the fridge will make.me look petty. but I don't want them out since there has also been ants by the sink and counter top. Of course I'm not going to confront her about it btw just want to know your opinions. *she has also been ignoring me not saying hi directly to me but greeting her son and our baby (while I'm holding her) She does this every time me and her son get into an argument I don't understand why it hurts me but iv learn to get over it. The first few times iv noticed this I spoke to my bf about it and he actually agreed and told me he caught onto that and was going to speak to her but he never did cus we don't really hold onto things like that and I hardly see her or atleast try not to be a bother around.