John Edwards has asked his mistress and baby mama, Rielle Hunter, to marry him -- just weeks after burying his wife, who lost a courageous battle to breast cancer, the National Enquirer reported on Thursday. Over the holidays, the disgraced ex-presidential candidate introduced his three children, Cate, 28, Emma Claire, 12, and Jack, 10, to the blonde campaign videographer. And to top it off, Hunter, 46, told Edwards' kids to "Call me Mommy," a source told the tabloid. While the National Enquirer first broke the story of the affair between the disgraced ex-presidential candidate and Hunter, they've gotten the bit...