What Finally Drove Jennifer Garner and Ben Affleck to Divorce

Since first announcing their split in June 2015, Jennifer Garner and Ben Affleck have remained close, sharing parenting duties and vacations — the actor even lives in the guest house of their L.A. property.

Now that their divorce is proceeding, the two “will continue to amicably work at their relationship to make this new phase work for the kids,” Violet, 11, Seraphina, 8, and Samuel, 5, a source close to the couple tells PEOPLE in this week’s issue.