Jesse James
Although he was still married to Sandra Bullock at the time, a number of women came out in 2010 and admitted to having affairs with James Franco. The couple separated not long after all of these revelations were made.
Hank Baskett
Even though Baskett co-starred on television with his wife, Kendra Wilkinson, he had an affair with her when she was pregnant, according to court documents. To say that everyone was taken aback would be an understatement. When asked to clarify the situation, Baskett referred to a time when he went to the bathroom and found two transgender women making out and attempting to drag him into the act. The pair has subsequently reconciled and gone on with their lives while remaining together.