Marriage came quickly for Khloe Kardashian and Lamar Odom. Starting a family, on the other hand, hasn't been as easy.

"If it happens, it happens," the 26-year-old tells the new issue of Us Weekly (on stands now). "It takes time, I guess."

Not that Kardashian and Odom, 31 -- who wed in September 2009 after 32 days of courtship -- haven't been actively trying to conceive a child.

"I don't know what the problem is," Kardashian tells Us.

For more details on the couple's baby troubles, check out this week's Hot Stuff video, as explained by Senior Editor Ian Drew and stylist June Ambrose.

Also in the roundup: Justin Bieber spoils Selena Gomez with a $2,000 floral arrangement, Naya Rivera devises a plan to get ex-flame Mark Salling written off Glee, and much more!