Jennifer Garner's boyfriend John Miller gave her an ultimatum after photos recently emerged of her and ex-husband Ben Affleck looking more than flirty. Despite always remaining supportive of Ben and Jen’s co-parenting relationship since he began dating the actress in 2018, the 47-year-old businessman, who works as the CEO of CaliBurger, feels Jen crossed the line. “John knows there’s nothing going on between Jen and Ben, but he doesn’t think those photos are a good look and feels it’s disrespectful to their relationship,” an insider said about the photos of Ben affectionately grabbing Jen by the waist. After the former couple sparked reconciliation rumors at their son Samuel’s paintball birthday party last week, a source told Page Six that Miller gave Jen an ultimatum — he doesn’t want to see anything like that again or he has no choice but to walk away.