Why she telling me that?

My mom has been complaining about me having too many plastic water bottle in the fridge (I have about 3 or 4) and then she told me to not buy one anymore and that I can’t bring a another one in the fridge otherwise if I buy a another one she will threw it in the garbage since it’s her house and she pays it, is she right or she overreacting

Why she telling me that?
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