Matt Damon Convinces Ben Affleck to Dump Playboy Model Shauna Sexton!

That's what best friends are for? Ben Affleck came to his senses and dumped much-younger Playboy model girlfriend Shauna Sexton after a long chat with Matt Damon, RadarOnline.com can exclusively report.

Damon and other close friends convinced the Batman actor, 46, to break things off with the 22-year-old, RadarOnline.com has learned exclusively, and questioned his lack of sensitivity around ex-wife Jennifer Garner.

As RadarOnline.com previously reported, Affleck whisked Sexton away to the Montana property he shares with Garner just hours after the divorce was finalized last week, upsetting the mother of his three young children.

“Ben’s friends were blown away that he would have the nerve to take a 22-year-old Playmate, who’s just a fling, to his newly ex-wife’s house where his kids sleep!” a source told RadarOnline.com. “They thought it was really gross, and let him have it."

“It finally registered with Ben that what he did was wrong."

Now the friends are hoping Affleck continues to "get healthier" as he continues his recovery after rehab.

Immediately upon his return from Montana, a source close to the actor told RadarOnline.com the relationship had ended.

Sexton shot down the news, telling RadarOnline.com the story was “not accurate.”

But according to a separate insider, Sexton is “desperate” to get back together with Affleck.

“She is pissed off and has basically told him ‘Why do you care what Jen says? You’re divorced,’" the insider explained. “He told her it’s his family. And they had a huge fight.”

“Basically, Shauna’s communicating with him and reaching out — but it’s one-sided."

"Ben’s more worried about Jennifer, and that he is in trouble with his kids.”

RadarOnline.com reported that Damon planned a party in Las Vegas last weekend to celebrate his birthday, but he and VIP guests were worried about sobriety-challenged Affleck attending.