Hi Jaguar,
She probably has a low self esteem and makes herself feel better by putting others down, but that doesn't make it acceptable.
Next time she does it you could try either making a joke of it or alernatively you could take her to one side and confront her about it. Ultimately you cannot change her behaviour, but you can change your reaction to it which may in turn indirectly change the way she behaves towards you anyway.
Gentle Blessings
Helen
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