Ben Affleck and Jennifer Garner were spotted having a moment together at their son's paintball birthday party, where they were photographed laughing AND Ben was pictured with his arm around Jen's waist.

The vibes are so intimate that you might call them flirty, and now a source is out here telling Page Six that Ben would be down to get back together with his ex. According to the outlet's insider, Ben “would love another chance” with Jen and “would definitely be open to giving things another shot with Jen if the timing is ever right. At the same time, Ben knows it’s just not realistic at this time in their lives.”

Unfortunately for Ben, the timing is all kinds of wrong. As the source put it, he “just got out of a marriage and finalized his divorce [from Jennifer Lopez], he is really busy with work and is focused on this new chapter. Plus, Ben respects Jen’s relationship with John [Miller] and would never come between them.”

Speaking of John Miller, a source told Page Six last month that he “doesn’t feel threatened in terms of Jen ever getting back with Ben, but at the same time, it’s hard not to feel jealous when it’s clear they have a strong connection and friendship.”

Meanwhile, another insider told Daily Mail in part that “John respects Ben, but less is more because John wants Jen for himself. He still needs to figure out how to compartmentalize it all.”