It's official -- Heidi is in love with her bodyguard boyfriend, she tells German magazine Bunte. The couple has been together since the fall, and Heidi says her kids are crazy for him, too. "He's been helping me for four years now. And he takes wonderful care of the kids," she says. "He plays with them, he protects them. I trust him." Will Martin ever go from being a bodyguard to being a stepdad?