“5 years and 4 kids,” she captioned a photo from their photo from their stunning May 24, 2014, wedding in Florence, Italy. “Life couldn’t be better!”
WATCH Kim show off her kids in Vogue's 73 questions:
The Keeping Up With The Kardashian’s star announced the arrival of her baby boy - who's is yet to be revealed - on Twitter last Friday, writing, “He’s here and he’s perfect!”
“He’s also Chicago’s twin lol,” she added. “I’m sure he will change a lot but now he looks just like her.”
Kim and Kanye also share daughter Chicago, 15 months, North, 6 next month, and son Saint, 3.
A source told PEOPLE this week that Kardashian West and her husband, as new parents of four, “have really found a way” to work as a team, with “everything falling into place for them.”
“There were definitely points where Kim was nervous — four kids is a lot!” the source said. “But she’s so happy and loves seeing all the kids interacting. Kanye is so happy to have a big family.”