Earlier this week, Kim Kardashian and Kanye West bought a $20 million mansion in Hidden Hills, Calif. But apparently before that they were building a palace of their own... with two kids' rooms.

We're not sure what became of the original dream home, but we do know that in a new clip from this week's Keeping Up With the Kardashians, Kim gives her grandmother, M.J., a tour of the construction site and drops a major bombshell:

Kim Kardashian Biography

A Kim Kardashian Selfie
Kim Kardashian is the ex-girlfriend of Nick Cannon, Reggie Bush and Ray J. She had intercourse on camera with the former, which is what... More »
Born
Birthplace
Los Angeles, California
Full Name
Kimberly Noel Kardashian

Kim Kardashian Quotes

So far, designing is the most exciting thing I’ve done... I have a vision of what I want [the clothes] to look like in my mind and it’s fun to see it come alive on paper.

Kim Kardashian

He just seemed very firm about the change, and that’s, like, his motto.

Kim Kardashian [on Barack Obama]