The CaliBurger CEO “has always been supportive of Ben and Jen’s co-parenting relationship but feels Ben crossed the line,” the insider says.

Jennifer Garner's boyfriend John Miller is reportedly fed up with her close ties with Ben Affleck and has given her an "ultimatum" after images of the former spouses getting cozy hit the Internet. Garner and Affleck have raised eyebrows as they continue co-parenting their children,

Jennifer Garner's boyfriend, John Miller, appears to be taking a stand after photos surfaced of Garner spending quality time with her ex-partner, Ben Affleck. The pictures, published by