Jennifer Garner, Ben Affleck
Jennifer Garner and Ben Affleck continue to co-parent their children despite moving on with their respective partners. Pictured: Jennifer Garner and actor-director Ben Affleck arrive at the Oscars at Hollywood & Highland Center on February 24, 2013 in Hollywood, California. Getty Images/Jason Merritt

Jennifer Garner and her boyfriend John Miller's relationship is going strong after 10 months of dating. While dating Miller, Garner is also co-parenting her three children with ex-husband Ben Affleck. One report recently claimed that Miller has played a big role in keeping their relationships harmonious.

A source recently claimed that the Cali Group CEO is supportive of Garner and doesn't demand that she focus all her attention on him. Miller reportedly understands that she prioritizes her children as he also has two children with ex-wife Caroline Campbell. The "Alias" alum reportedly also makes sure to respect Miller's boundaries and gives him his space.

“Things are working well for Jen with John because he is patient with her and not too demanding of her time,” a source told Hollywood Life. “He has kids too, so he gets it that her family comes first, and she respects his space too."

As for his interactions with Affleck, Miller reportedly respects Garner's ex-husband, especially since the actor-director is taking his daddy duties seriously. The source went on to say that Garner and Miller have found the perfect balance in their lives and are "getting along great."

This seems to echo the statements of another source, who told Entertainment Tonight earlier this year that Garner and Miller have spent time as a family with their respective children. The insider said that the businessman and his kids were often at the "Peppermint" star's Pacific Palisades home and stay up late playing board games together.

While Miller and Garner apparently aren't ready to jump into another marriage yet, the source said that the actress "has built a healthy foundation with John." Due to this, the insider explained that Garner and Affleck are spending less time together these days in order to move on.

"Jen is at a very healthy point in her life," the source said. "She adores her kids and her career and has fallen in love with a man who is supportive and loving to both her and the kids.”

But while they are moving on with their respective partners, Garner and Affleck still do meet up in order to spend time with their children as a family. Just this week, the exes were spotted smiling and chatting happily with each other as they take their kids to school, according to Daily Mail.