There is no civil liablity that you can claim against your spouse's paramour. I believe there are only three states that still have such laws on the books, all in the south, and not sure how often such suits even come up.
If you file for divorce, there are arguments you can use against your spouse for a larger share of assets but nothing against a third party.
About 25 year ago in Ohio, all alienation of affection suits were abolished by General Laws c. 207, Section 47B.
A dismissal motion will be filed in any lawsuit you bring that trys to seek damages for alienation of affection.
Alienation of affection statutes are reminants of a era where women were considered property. If your spouse is sleeping around it is primarily your spouse's fault. No one forces someone to cheat. File for divorce on grounds of adultery and move on.
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