The pair have been married for eight years, and have two children.
40-year-old David had to confess about cheating, because a former mistress threatened to tell the media about their affair.
He told People magazine: “I was associated with a woman who I was involved with and had a relationship with. She asked for money. I felt as though I was being blackmailed or there was some sort of extortion.
“We’re working on our marriage. We’re working on repairing what has been damaged so badly.”