How can I repel my sister-in-law?

A very good example: flirt with her husband
Anything to keep her from coming to stay with us for visits or permanently. I don't want to see her. I'm not even talking to her, and she's visiting our house for the holidays. She manipulates my husbands feelings and pretends to need help. She tries to make me look bad in front of him.
Please share some serious strategies.
Updates:
5 d
I forgot to mention. She threatened to pierce my baby's ears without my knowledge or consent.
She has dementia.
She does not take anything seriously.
She's a smoker.
She's a two faced liar. She fights with her husband in private and pretends they're newlywed doves in public, then tries to make me look bad in front of my husband.
How can I repel my sister-in-law?
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