EXCLUSIVE: Rob Kardashian and Blac Chyna Missed Kardashian Family Christmas to Focus on Themselves

Rob Kardashian and Blac Chyna are back together and focusing on their relationship, a source tells ET.

Rob Kardashian and Blac Chyna are dealing with some family and relationship issues.

The on-again, off-again couple missed Rob's mother Kris Jenner's big Christmas Eve bash -- which was attended by the entire Kardashian family, including Kim and Kanye West -- and a source tells ET that their recent drama is definitely the cause of their absence. Rob has since apologized for his social media meltdown late last month, when he said Chyna left him and took their newborn daughter, Dream.

"It's safe to say Chyna and Rob took some time off to focus on their immediate family," the source says. "It's not a bad thing, and they needed a break for themselves, and their daughter. They are back together now and focusing on their relationship."

WATCH: Blac Chyna Ditches Underwear, Leaves Little to the Imagination in Fishnet Ensemble

According to our source, there's definitely tension between the Kardashian family and Chyna, mainly due to Rob involving his family in their arguments.

"It's understandable that [Rob] wants their opinion on things that are going wrong, but as everyone knows, family doesn't forget, especially a mom," the source explains. "So, after Rob calls his sisters and mother and shares everything with them, it's hard for Chyna to re-enter the family after they reconciled, mainly for Dream's sake."

However, the Kardashian family apparently understands Chyna's frustrations with 29-year-old Rob.

"The family does feel bad for Chyna at certain points," the source shares. "It's hard to deal with a person suffering from depression and mood disorders. There are days that are bad and then good. Everything hinges on how Rob is doing the moment he wakes up -- is he going to work that day, will he be a dad this day? The girls understand that Chyna is in a tough place, but ultimately, their priority is Rob and they will stand by him until the end."

Baby Dream is also the Kardashian family's top priority.

"They'll do everything they can to make sure Dream grows up in a very normal environment," the source adds.

WATCH: EXCLUSIVE -- Rob Kardashian Hospitalized for Diabetes: He's 'Fallen Off Track Recently'

These days, things appear to be going well between Rob and Chyna. Following Rob's hospitalization last week due to complications with his diabetes, he shared new photos of 28-year-Chyna and their adorable daughter.

"My babies," he captioned one pic of Chyna holding Dream.

Watch below:

-- Additional reporting by Jennifer Peros