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If the cheating was the direct cause of the divorce, then yes. Such actions often make prenup agreements void, but you'll have to check with your lawyer because laws may be different in various US states or in Canadian provinces. This applies to marriages without prenups, and compensation.
Compensation to the wife is typically given if the wife was a homemaker. If she was a working wife, compensation may be given if the income difference between husband and wife were substantially different (i. e., you make millions, she makes $50k/year). The reason being that the law decides that both parties are entitled to maintaining the same lifestyle for some time (1 year) after a divorce.
If she was getting compensation and found another man, that compensation becomes void.