"I can't imagine them not getting married. That's in their future!" the source told the mag.
Meanwhile, the new parents have been spending their time on the wonderful bundle of joy that has recently entered their lives.
"They're putting work aside right now to focus on the family. They're in it 100 percent," the pal added. "Kanye is already an incredibly present father. He's very relaxed and comfortable."
Kim touched on the idea of tying the knot with Yeezy during an interview on the Today show in January.
"[Marriage is] something that we talk about, but I think it's just right now [we're] focusing on the baby," she said. "What I've learned in life is—I was always such a planner, and...you think your life is going to be a certain way, and the best surprises just happen when you don't plan."
Tune in to Keeping Up with the Kardashians on Sundays at 9 p.m., only on E!