Jennifer Garner and John Miller reportedly enter couples therapy due to Ben Affleck's presence

Ben Affleck's constant presence is causing tension in Jennifer Garner and John Miller's relationship.

Jennifer Garner and her boyfriend, businessman John Miller, have reportedly been driven to couples therapy due to the presence of a familiar "third wheel" — Garner's ex-husband, Ben Affleck.

The former couple, who share three children, have been coparenting successfully, but Affleck’s frequent visits and closeness with Garner have created tension in her current relationship.

According to sources, Affleck, 52, has leaned heavily on Garner ever since his marriage to Jennifer Lopez ended last year. The former "Alias" star’s constant presence has caused frustration for Miller, 47, who has been dating Garner on and off since 2018. In particular, Miller hit his breaking point when Affleck was photographed getting cozy with Garner at their son Samuel's 13th birthday celebration at Combat Paintball Park in Castaic, California, on March 2. Affleck was seen with his arms wrapped around Garner, a gesture she seemed comfortable with, sparking a series of conversations between Garner and Miller.

"John has been so patient with the whole Ben situation, but it's really grating on him," Radar Online insider shared. "He loves Jennifer and doesn't want to lose her, but there's only so long he can stand having a third wheel in this relationship before he cracks."

Sources suggest that while Affleck’s frequent visits are rooted in their shared responsibilities as parents to Violet, 19, Fin, 16, and Samuel, the deeper issue lies in Garner’s nurturing of Affleck's emotional needs, which Miller finds difficult to accept. Despite Garner's efforts to distance herself from Affleck, he continues to be a constant presence in her life — attending family dinners, holidays, and often staying over at their home.

Miller, who reconciled with Garner in 2021 after a brief separation, is now demanding that she establish firmer boundaries with her ex-husband. "He’s not asking her to cut Ben out of her life entirely, but he’s tired of being made to look like a fool," as per Radar.

The couple has been addressing these issues in therapy, but the source noted that it may be the only way to resolve the mounting tensions. While Garner and Affleck previously tried therapy before their 2015 divorce, it remains to be seen if current therapy sessions will help Garner and Miller navigate this complex dynamic.