Jennifer Garner’s boyfriend John Miller is expressing his frustration over the actress’ cozy photos with her former husband Ben Affleck.

The 13 Going On 30 actress, who has been dating Miller since 2018, has compromised her current relationship with her unexpected closeness to Affleck.

A source close to the couple has recently confirmed to Page Six that Jennifer Garner’s latest actions have prompted John to establish boundaries.

The insider told the outlet, “John has always been supportive of Ben and Jen’s co-parenting relationship but feels Ben 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.”

The photos were captured during the former couple’s son Samuel’s 13th birthday celebration at Combat Paintball Park in Castaic, California, on March 2.

In the photos, Ben was spotted holding Jen close as she set the target of her paintball gun.

This didn’t sit well with the businessman and he was quick to “give Jen an ultimatum.”

The source further went on to add, “He doesn’t want to see anything like that again or he has no choice but to walk away.

“John feels like a third wheel. Their growing bond is getting to be a bit much when Ben spends all the holidays with them like Christmas and Thanksgiving.”

For the unversed, Jennifer and Ben have been married from 2005 to 2018 and share kids Violet Anne, Seraphina Rose, and Samuel together.