Remember when Gavin Newsom apologized for sleeping with his best friend's wife in 2007? The woman Newsom had an affair with also worked for him. She was his subordinate. Newsom began dating his current wife in 2006. Check out what she said in 2007 about Gavin Newsom sleeping with his subordinate. Jennifer Siebel Newsom, AKA Miss "I hate predators, more power to women": "The woman is the culprit."