Kourtney Kardashian can't move into her new home because of mold

Home sweet … mold? Kourtney Kardashian and her family have been halted from fully moving into their new estate because there is a mold infestation, sources tell Us Weekly.

Scott Disick and the pregnant reality star recently purchased Keyshawn Johnson's sprawling Calabasas abode. According to TMZ, their decorator found mold when installing fixtures while the parents to Mason, 4, and Penelope, 2, were filming in the Hamptons.

"It's true," a source tells Us of the infestation. While TMZ reports Kardashian is threatening to sue, the insider tells Us that "she's not upset, but she can't move into the house with the mold situation."

So where is a family of four — with one more on the way — to go? The growing clan was snapped checking into Beverly Hills' Montage hotel in the posh 90210 area on Monday, Aug. 18.

This isn't the first issue Kardashian has had with the new home. As documented on Keeping Up With the Kardashians, the family had a rat issue as well.