Jennifer Garner To Ben Affleck: One More Drink And You’ll Never See The Kids

Jennifer Garner has laid down the law to estranged alcoholic ex-hubby Ben Affleck — fall off the wagon and lose custody of the kids!

“There’s no margin for error on Ben’s part,” says a source close to the couple. “If he slips up and has even one drink, that’s it. She’s going to take the children — no ifs, ands or buts!”

Right now, Ben, 44, and his wife of 10 years are co-parenting their kids Seraphina, Violet and Sam even as they work out details of their divorce. The pair rocked Hollywood back in 2015, declaring their marriage was dead in the water. Sources told The National ENQUIRER Jen  kicked the director-actor to the curb because of his boozing, gambling and suspicions he cheated with their nanny. Still, the Hollywood power couple held off on divorcing until April 13, when they suddenly filed papers in an L.A. court, citing an “amicable” breakup due to irreconcilable differences.

Earlier, the pair seemed headed for a reconciliation. On March 14, the 6-foot-4 movie heart-throb completed a stint in rehab where he battled his booze demons. Sources said the pair was visited fertility docs in the hopes of mending their shredded marriage by having twins! Unfortunately, he had also piled on flab — ballooning from a hard-body 208 pounds to a plumpish 256, leading pals to fear he was eating himself to death. New York diet doc Stuart Fischer tells The ENQUIRER switching addictions like booze for food is common for people with “addictive personalities” — who “rely on substances of one type or another.”

Then, the couple drastically changed course with the divorce filing. They filed without lawyers, asking for joint legal and physical custody of their three children. Beverly Hills divorce attorney Stephen M. Martin says by filing without lawyers, Jen and Ben are sending each other the message they intend to “negotiate in good faith, keep the matter private and minimize conflict.”

Sources say Jen is giving Ben a chance to prove himself. But he’s moving out of the guesthouse where he holed up before the final divorce decision. Martin believes Jen wants Ben to show he can stay off the sauce — or else! The attorney suspects the former couple has agreed to Ben's "probation,” in hopes that remaining an involved parent will “motivate him to remain committed to his recovery.”