Ben Affleck and Jennifer Garner still may be spending ample time together under one roof, but a source tells PEOPLE in this week's issue that their divorce is still proceeding.
"This more seems like a transitional period," the source says.
The two even celebrated the holidays with their three children: Violet, 10, Seraphina, 6, and Samuel, 3, in the mountains of Montana.
According to the source, the actor continues to stay in the guest house on the family's L.A. property as he and Garner remain focused on parenting.
"They interact every day.
Mostly about the kids and simple things," the source adds.
"Jen wants Ben around for the kids."
After the New Year, Affleck, 43, will continue to shoot his new period film, Live By Night, on which he serves as screenwriter, director and actor.