Eddie Cibrian Cheating? LeAnn Rimes Suspected Affair Before Entering Rehab

LeAnn Rimes reportedly fears that her husband of one year, Eddie Cibrian, is having an affair, according to new reports.

The country music star shocked fans when she announced that was entering a rehab facility on Thursday, and her husband's alleged cheating scandal may explain her emotional breakdown.

"LeAnn is beyond stressed about the cracks in her relationship with Eddie and she has been really scared that he is cheating on her," a source told RadarOnline.com.

"LeAnn called a friend of hers a few weeks ago sobbing hysterically about Eddie going out. She was home for the weekend and he didn't stay in with her and she was crying saying that she was so worried about what he was doing when he wasn't with her," the source went on.

Rimes, 28, has received widespread backlash from the public ever since she admitted to having a relationship with Cibrian, 39, despite the pair both being married to other people at the time.

The singer's representative confirmed that Rimes, who has endured an increasing amount of abuse on Twitter over her controversial marriage to Cibrian in recent weeks, voluntarily entered a treatment facility to help overcome emotional issues.

"LeAnn has voluntarily entered a 30 day in-patient treatment facility to cope with anxiety and stress," Rimes' rep, Marcel Pariseau, told People magazine in a statement. "While there will be speculation regarding her treatment, she is simply there to learn and develop coping mechanisms. While privacy isn't expected, it's certainly appreciated."

Critics flocked to Twitter in response to Cibrian's cheating rumors, offering little sympathy for the singer.

"THERES A NASTY B---- NAMED KARMA ONCE A CHEATER..." dina stavola tweeted.

"Maybe if LeAnn Rimes wasn't so busy stealing other people's husbands while cheating on her own she wouldn't have so much 'anxiety & stress'," Hilary tweeted.

"Karma for LeAnn at last! I'm sure Brandi Glanville is laughing hard somewhere," Claire Payne tweeted.