Gibbs's second wife has caused a lot of drama.
Years after Shannon and Kelly died, Gibbs was ready to put himself back out into the dating world. He met a fiery redhead named Diane, and the two seemed to hit it off. It wasn't long, however, until the two got a divorce.
Diane, who once said she was simply Gibbs's "human antidepressant," later went on to marry FBI Senior Agent Tobias Fornell, despite Gibbs's numerous warnings. Fornell later wished he'd listened to Gibbs's advice after Diane cleaned out his bank account.