This sibling rivalry has escalated to a shocking level, leaving one mom questioning everything.

I’m 22f. My sister is 27f. We had babies within two weeks of each other, and our sons are now 3 and 5 weeks old. Her son is breastfed and mine is not. I needed to get surgery recently, and because my son’s father isn’t around, my sister and BIL offered to babysit my son while I was in the hospital (3 days total) free of charge.
When I came home today, I walked into my son on my sister’s breast, which I actually didn’t have an issue with to begin with because it was probably easier to BF him than make bottles but she told me after she had thrown out all of the “garbage” I was feeding him and she was going to pump+donate milk to him.
I was kind of in shock so I didn’t react straight away but I went to the bathroom and called the police on her. Apparently what she did wasn’t a crime, and the child is being fed so they couldn’t even do anything about it.
My sister then blew up at me, saying it was completely wrong of me to call the police on her when she was just trying to help, I told her she dumped 14 cans of formula without even consulting me and currently had nothing to replace it with, just plans to.
She now wants me to pay her for the babysitting she did but I told her I can’t even afford to replace the formula while I’m on maternity leave so I won’t be paying her for the babysitting.
She ended up storming out, and blocked me on everything. Our parents were able to replace 2 of the cans she threw out but can’t do much else. They also think I was a dick for calling the police on her because getting a record could affect her government job and therefore my nephew.
aita?
Edit: there’s no way my sister would have replaced the formula, she is completely against it, and has been vocal about her dislike for me using it
Edit 2: my sister did not have a supply already pumped, nor has she even used her pump yet so not only did she not have anything to replace what she threw out, she had no idea how her body would respond to a pump. The only way she could have been feeding my son over the next few weeks would be to put him on the boob, which would take time away from me being with him.
Edit 3: my sister went to my house for the childminding.
Conclusion
The aftermath of this shocking betrayal is still unfolding, with accusations flying and one sister completely cutting ties.
Will these sisters ever reconcile, or has this act of ‘help’ permanently destroyed their bond?
Here’s how people reacted:
She destroyed your property, and I’m baffled how destroying property is supposed to be *ok* because she breast fed at that moment.
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I was going to say:
*But you just… went into the bathroom and called the police? You didn’t say anything to her first, say, to make a demand that she replace what she destroyed? (Speaking of which, was it just sitting in the garbage? Did you check? Or was it poured down the drain?)*
But at the end of the day it’s the same as someone saying they decided TVs are bad for kids so they smashed yours. Can’t do that. (*How* did the police say it wasn’t a crime?)
Small claims court?
Your sister majorly crossed some boundaries that, in many respects, could be considered criminal. If this was the first time she did anything that disrespected your boundaries, I would say calling the police was an overreaction, but it seems that she has been very vocal about things that are none of her concern and this was just her escalating her behavior, which was already over the line. Plus, she’s messing with your infant *and* your ability to care for him while you are vulnerable, in the hospital, and depending on her support, all of which she leveraged to violate your boundaries. I don’t think that expecting you to take that calmly is fair.
Edit: my bad, formula is more expensive than last time I bought it for a friend with a baby. 14 cans worth of it is more like $300+. Yikes, that’s totally out of pocket to destroy that much of someone’s property over a healthcare disagreement, *particularly* when you know an infant is depending on that property.
Your sister is an obnoxious, judgy AH. She should not be giving you shit about how you choose to feed your child. She should *never* have thrown out your formula. That’s extremely fucked up.
You also shouldn’t have called the police. That’s equally fucked up, maybe moreso.
She took care of your newborn for 72 hours straight. That is normally a costly service and would about equal the cost of the formula. If not for her you would have had to pay someone to babysit. And she had a newborn of her own at the same time.
You’re even. And you both acted like AHs.
Reddit will defend it because Reddit loves revenge porn and “but mah property” but that’s a ridiculous overreaction as a FIRST response and needlessly escalated the situation. No attempt to get the money back, no argument, just straight to call the cops? On your sister who took care of your baby for free? Wtf.
I just can’t get into that headspace. Well, either headspace here. Hence ESH. Y’all have issues.
NTA
You overreacted by calling the police. That being said, I doubt you had a lot of other options.