Why do promiscuous women who talk to married men or men in relationships feel the need to expose them to their wives?

Often these women know the guys they're talking to are married or in relationships, they entertain the conversation, send inappropriate pictures and messages, sometimes even end up sleeping with them and then expose them to their wives. What's all that for?

Why do promiscuous women who talk to married men or men in relationships feel the need to expose them to their wives?
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