SOURCE: MEGA

Jennifer Lopez is pulling out all the stops to keep her marriage to Batman star Ben Affleck solid — including buttering up his ex-wife, Jennifer Garner, to make her an ally, RadarOnline.com has learned.

Sources spilled the Hustlers actress has gone out of her way to be a friend to the mom of Ben’s three young kids and a loving co-parent in their blended family.

SOURCE: MEGA

“J Lo has come to accept that Jen will always be a huge influence on Ben,” the insider shared. “Even if they’re not married, he still values Jen’s opinion and respects her.

“While Jennifer is one of the issues that’s caused recent tension in Ben’s marriage, J Lo admits it helps her cause in the end.”

The source said that “instead of fighting it, J Lo’s trying a new approach — to join forces with Jen and be her pal.” The crafty spitfire’s reported goal is to schmooze Jennifer totally to her side as an ally and confidant.

“It’s a huge shift in strategy, but her relationship’s in major trouble right now, so desperate times call for desperate measures,” said the source.

SOURCE: MEGA

The ladies began playing nice last month when Jennifer took J Lo’s kid to the Happiest Place on Earth. The 13 Going on 30 actress was photographed chaperoning a group of children — including her youngest daughter, Seraphina, and J Lo’s 15-year-old Emme — at Disneyland.

Befriending Jennifer is J Lo’s last-ditch effort to save her struggling marriage. Shockingly, the singer and Affleck’s clashes have sparked whispers of divorce less than a year after they tied the knot.

“J Lo doesn’t want to fight with Ben anymore,” said the insider. “She wants peace and harmony and for Ben to love and cherish her again. And the best person to help her is Jen.”

RadarOnline.com has reached out to J Lo and Jen’s reps for comment.

SOURCE: MEGAJennifer Lopez and Jennifer Garner reportedly clash over Ben Affleck’s smoking habit.

Sources told RadarOnline.com that Jen became Ben’s support system earlier this year when he allegedly began having marriage issues with J Lo.

SOURCE: MEGA

They also said that post-honeymoon, things quickly began to sour between Bennifer 2.0. The pair bickered over his wardrobe and bad habits. “He’s a jeans and t-shirt kind of guy and now Jennifer is trying to tell him what he can and can’t wear,” the pal dished. RadarOnline.com broke the story — Ben’s smoking also became an issue.

“She absolutely hates Ben’s cigarettes,” the insider explained. “He promised to give it up, but with all her nagging he’s smoking more than ever.”