Report: Married LeAnn Rimes Doing Eddie Cibrian

Us Weekly definitely stepped up to the plate this week.

Instead of the usual "stars are just like us" tripe, the celeb news tabloid has gone and apparently outed a celebrity extramarital affair. Nice work!

The offenders in question: LeAnn Rimes and her shocking affair with her TV movie costar, Eddie Cibrian, the magazine reveals in its newest issue.

Rimes, 26 - currently wed to former backup dancer Dean Sheremet - got cozy with Cirbian, 35, on the set of her Lifetime movie, Northern Lights.

Eddie Cibrian was recently seen in Ugly Betty, Invasion and Samantha Who?

Eddie Cibrian is supposedly banging LeAnn Rimes. Both are married. Not to each other.

"From the moment we rehearsed, LeAnn and Eddie honestly developed a really strong bond and a warm relationship," director Mike Robe said prior to news of the affair, and that rapport seems to have carried off the set as well.

New pictures (so grainy you cannot even see what's going on and are thus not shown here) are taken from a video security camera that show the two holding hands and kissing on a romantic dinner date in Laguna Beach, Calif., on March 7.

Additionally, the celebrity gossip publication reports that the new couple met for a three-hour tryst at the Malibu Beach Inn on March 14.

LeAnn Rimes married Sheremet in 2002, when she was just 19.

Cirbian tied the knot with model Brandi Glanville in 2001; they have two sons, ages 5 and 23 months. This whole thing is sort of shady!