When Kim Kardashian's sister Kourtney began having kids with her boyfriend sans engagement ring, Kim couldn't hold back her judgment.

“I was like, ‘You’re not married! How could you do this?’ I was really firm and strict," the 32-year-old tells Cosmopolitan magazine in its April issue. "But she was like, ‘Marriage isn’t what I want.’ And later, I realized she had a better family life than I did.”

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