A month after "Keeping Up with the Kardashians" star Scott Disick and his longtime girlfriend Kourtney Kardashian welcomed their third child together, the businessman has opened up about his new bundle of joy to Us Weekly.

"It's my third time so it's kind of a charm," Disick, 31, said of Reign Aston, who was born on Dec. 14. "I think I kind of know it by now. The first one was scary. The second was less scary. The third one was, okay " I got a whole team over here."

Disick and Kardashian welcomed Mason, their first child, in December 2009 and Penelope, their second, in July 2012, and according to Disick his girlfriend has "loved it everytime."

As for how the his two older children are handling the new addition to the family, Disick said Mason and Penelope have been "accommodating and welcoming."

"I don't think I would have been that way if I had a sibling," Disick shared. "I can not get over how much affection the other two have shown the baby. It's like " thank God, knock on wood."

Asked about his thoughts on fatherhood, Disick said he "wouldn't be able to wrap it up into one word."

"It's pretty wild to see something that you made, turn into a human being that you are today. It's scary too " but cool."