AITA for kicking my SiL out after she threw away most of my single use baby products and even formula?

[u/CrunchySiL]

I'm 19f, I have a 3 week old baby girl. I do still live with my parents, but since I pay rent equally, they say I can have just as much of a say in who comes and goes from the house as they do. I've never actually taken advantage of this rule until recently enough. I have a brother, who's 26 and his wife is 24. They're "crunchy parents" to a 8 month old.

Basically what that is is fucking stupid, they use reusable wipes/nappies, think formula is the epitome of evil, babywearing, the list just goes on. I'm the complete opposite, pacifiers, supplementing with formula due to low supply, disposable wipes and nappies. They are completely against the products I use and often give me things like SiLs breastmilk in bags, disposable nappies their LO has grown out of, etc. I've used some but it's not really my cup of tea.

On Monday night, my bother and SiL were minding my baby for me since it was my birthday and my babys father (not together, very close friends and co parents) took me to get some dinner in one of my favourite fast food places. It was great and really relaxing.

When I got home that evening, my SiL said that she did some cleaning and "threw out anything I don't need". This immediately gave me red flags but they were in a hurry to get out the door and left almost immediately. When I went into the nursery, every disposable nappy and wipe pack was gone and replaced with some reusable cloth ones. Same with my formula, there was 8 tubs and all of it was gone, I'm not able to replace them at the moment and soley breastfeeding isn't sustainable for us.

I was extremely angry and I just turned my phone off to avoid being mean to my SiL. She and my brother came over yesterday to collect something they forgot and that was when I confronted her. I told her she has to replace everything she dumped. When she said she can't afford to, I said fine, just get out and don't come back until I've been reimbursed or everything is replaced with the original items.

My brother thinks I'm being a massive asshole and he's on his wifes side. Our parents think im being completely reasonable here but they think telling her essentially not to come back is taking it too far. AITA?

[u/apaige86]

Ugh. Hate the way this goes. To me it feels like a losing battle for moms, no matter what they choose. I breastfed both my kids. I work 12 hour shifts and made a rookie mistake of not starting to pump and freeze milk before I went back to work with my daughter. I ran myself ragged trying to keep up. Finally, I had to supplement with formula. And for some women- you would have thought I was feeding my daughter pond water. They were so “appalled” and some were “very disappointed” that I wasn’t more committed. Then I got the other side when both of my kids turned one and were still nursing- then I was “disgusting” and “inappropriate”. The worst part is that it’s so often women tearing other women down. I had no problem shutting down old men who were offended by me feeding my kids in public, but I found myself feeling really hurt and isolated when women were so cruel. Like it’s been said over and over in these replies- fed is best. So pull out your boob or whip up a bottle and snuggle up. They grow fast.

Edit: In case it wasn’t clear- NTA.