Am I ruining my sister's married life?

She always tries to spoil my happiness and always talks behind my back. Not once has she said nice things about me. She always enjoys me being sad and is jealous of me because I am financially independent and I travel and buy expensive, luxurious things.



I am thinking of destroying her married life and lying to her husband that she is cheating on him with someone and making her always sad like she did to me.
Am I ruining my sister's married life?
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