Article continues below advertisementKristen Bell is getting some heat for a distasteful murder joke she made about husband Dax Shepard. Taking to Instagram to wish Shepard a happy anniversary on Saturday, October 18, Bell captioned a photo of him embracing one of their daughters: "Happy 12th wedding anniversary to the man who once said to me: 'I would never kill you. A lot of men have killed their wives at a certain point. Even though I'm heavily incentivized to kill you, I never would.