Am i in the wrong for being downright angry that my MIL disrespected our wishes about our 8 mo old daughters feedings?

My mil took care of me and my husbands 8 mo little girl last night and gave her back to us this morning. We specifically told her we aren't starting her on cows milk til she's 1, and then it has to be vitamin d milk. She returned her to us with a 8 oz bottle of MILK and I thought it was formula because (silly me) I thought she'd respect our wishes regarding our child. Since she said the bottle was only 30 mins old I thought it'd still be OK if it was formula. So I gave it to her and she couldn't keep it down, so I smelled it and it smelled like it was straight up spoiled milk. Am I wrong for being angry?? She's trying to tell me its formula but I know the difference in smells between spoiled milk and spoiled formula. I'm not stupid. She always belittles me and tries to take charge and mother MY child. What should I do??!!

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