"Both Jen and Courteney are tired after a long year," a source close to Cox tells PEOPLE. "They celebrated Christmas [with] each other and just focused on making things special for Coco."
Cox, 46, and her husband, David Arquette, who separated earlier this year, also made an effort to give Coco, 6, a merry Christmas, putting in some time as a family over the holidays.
While the source says Cox and Arquette, 39, are getting along well, he is finding the separation difficult.
"He's just not handling this situation well," says another source. "He's really depressed. There was a moment when David thought they'd get back together but that doesn't seem like it will happen now and it's really tough on David."
Even so, at this point the pair have no imminent plans to divorce, says the source.
With reporting by PERNILLA CEDENHEIM and AILI NAHAS