Is she jealous, if she does this?

Ruins my relationship with a man and refuses to tell me what she did.
Talks about me behind my back.
Acts nice in public, but does dirty stuff (flirting with people's husbands) behind the scenes and allows Mr to take the fall for her actions.
Is passive-agressive towards me.
Changes her style to copy mine.
Acts as though she's innocent.
Is she jealous, if she does this?
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