Brandi Glanville thinks Eddie Cibrian that will cheat on LeAnn Rimes.

The Real Housewives of Beverly Hills star - who has two sons, Jake, six, and Mason, 10, with her ex-husband - doesn't think he will be able to stay faithful to the country singer, whom he first got together with when he was still married to Brandi.

The 41-year-old reality TV star told California radio station Q104.5's Up & Adam in the Morning, "I hope that I'm wrong, but I do feel that [the saying] 'Once a cheater, always a cheater' applies in this instance. I feel like once you cross that line, it's easier to do another time, but I hope not."

The Drinking & Dating: P.S. Social Media is Ruining Romance author accused Eddie, who recently bought a new $3 million home with LeAnn, of asking her for child support earlier this week.