Jennifer Garner's boyfriend, John Miller, appears to show 'insecurity,' a body language expert says. Here's why.

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

Speculation swirled in February that Affleck was keen to reunite with Garner after they were spotted bonding on multiple occasions in the subsequent months after his divorce from Jennifer Lopez. (Affleck and Lopez, 55, settled their divorce in January after two years of marriage.)