“The divorce has been difficult for him, but knowing that he has access to his little ones and has split custody is making the transition easier,” the source says. ”

“The kids are doing great and the older ones have had time to process and understand the situation,” the source continues. “Kim and the rest of her family have done an excellent job at coaching the kids through this.”

ET’s source says Kim feels “absolutely relieved” since filing for divorce from Kanye.