Surprise! Karma done cometh for LeAnn Rimes….Eddie Cibrian left the mother of his two young sons for the country superstar – now he’s stepping out on her too! When does this man get time sleep? Futhermore, when will women understand that if a man did it with you, eventually he will do it to you? Chimps! I work with chimps!

The 36-year-old CSI: Miami star fell for LeAnn — who is also married — when the pair co-starred in Northern Lights, a Lifetime Original Movie that aired in March. However, “love” hasn’t stopped this notorious womanizer from rekindling his passionate affair with model Scheana Marie Jancan — most recently romanticaly to another Hollywood HeHo, crooner John Mayer.

“Eddie has recently started seeing Scheana again. He told her he’s only with LeAnn for the publicity and that he plans to end things with her soon,” tattling spy divulged to Life & Style this week.

According to the insider, Eddie is going to extreme lengths to satisfy his libido behind LeAnn’s back: “He has a friend drop him off at Scheana’ apartment, where he’ll usually spend about two hours. Then a friend picks him up. He never spends the night at Scheana’s because he’s afraid LeAnn will catch on.”

A second source chides LeAnn for getting involved with Eddie in the first place, but adds that the “I Need You” singer has no idea what she’s in for if she continues living in sin with the Cibrian: “Eddie’s never going to be faithful to anyone. If she stays with him, LeAnn is headed for heartbreak.”