First Eddie Cibrian, Now LeAnn Rimes Split from Spouse

It takes two to tango.

So it's no surprise that in the same week Eddie Cibrian's wife announced that she has left him over his reported affair with LeAnn Rimes, the country singer admitted that her own marriage is on the rocks.

During her performance at the Deer Valley Music Festival in Utah on Saturday, Rimes sounded off on the difficulties of relationships.

"It is inevitable that sometimes in a relationship, you will have your heart broken," said the singer, who, according to the tabloids, separated from her husband of seven years, aspiring songwriter Dean Sheremet.

"Sometimes you don't do anything, but sometimes you want revenge. Sometimes you don't, and that's when you just leave it in God's hands and know that he will take care of it," she said before singing, "God Takes Care of Your Kind."

A source told Us Weekly magazine on Saturday that Rimes, 26, and Sheremet, 29, are "leading separate lives... but still in each other's lives as best friends. They are not divorcing yet, but working through things and taking time apart... while they figure things out."

Sheremet also posted on Twitter on Saturday: "Thanks to everyone for all the support through a very difficult time!"

Earlier in the week, Cibrian's wife Brandi Glanville announced that she and her husband had separated.

A month after calling Rimes a "stalker" for continuing to pursue her husband, Glanville told Us Weekly: "Eddie and LeAnn deserve each other."

"Eddie and I have decided to take some time apart," Glanville, 36, the mother of two young boys, said. "I want to do what is best for our children.

According to Us Weekly, the final straw for Glanville came after Cibrian, 36, and Rimes, co-stars of a steamy Lifetime movie, were seen togther again July 17, four months after the magzine first reported that they were having an affair.

Glanville had stayed mum until last month, when she broke her silence and accused Rimes of stalking her husband.

"LeAnn is a stalker," Glanville told Us at the time. "She refuses to leave us alone -- it is shameful and scary. People are going to say it takes two to tango, and I get that but, at some point LeAnn needs to stop asking him to dance."

Glanville claimed that Rimes, who is married to Sheremet, showed up at a Los Angeles Lakers game Cibrian attended May 17, weeks after he'd changed his phone number to end Rimes' "constant texting and calling."

Rimes' motive, according to Glanville? Publicity.

"LeAnn is so desperate for fame she has left her self-respect in the gutter and doesn't care who she hurts to get what she wants," the model and mother of Mason, 6, and Jake, 2, told US. "She's hurting my family and messing with the wrong mom."

Rimes' representative didn't immediately return requests for comment. Her last major public appearance was at the MTV Movie Awards in June, where she performed.

Anatomy of Rimes and Cibrian's Alleged Affair

The country music prodigy's personal life gained attention in March when US reported that she was having an affair with Cibrian, her co-star in the Lifetime movie "Northern Lights," which premiered later that month.

The magazine devoted a cover story to Rimes' reported infidelities, citing security camera images of Rimes and Cibrian kissing during an intimate dinner and photographs of them arriving at and leaving an exclusive Beverly Hills hotel, where they apparently had a four-hour rendezvous.

"She is having an affair," senior editor Ian Drew told at the time. "It's not even a joke or speculation or from a shady source."

But why put Rimes, whose biggest hit, "How Do I Live," was back in 1997, and who has been overshadowed by country-music princesses Taylor Swift and Carrie Underwood, on the cover?

"Everyone thought she had this perfect marriage, she always had such a perfect reputation," Drew said. "It's just a surprise to everyone."

After the story of their reputed affair broke, Cibrian released the following statement to reporters:

"Other than being friends and two actors who were romantically intertwined in a movie-for-television we filmed last fall, there is no truth to the reporting initiated by Us magazine. It is a fabricated story that is using random snapshots as connective tissue to create a scandalous relationship."

Rimes, married to Sheremet for seven years, responded to the report in a blog post on her Web site. But she left readers with plenty to read into:

"This is a difficult time for me and my loved ones, but I appreciate all your continued support. I would like to assure all of you that this is a place for you to hear things directly from me and as you all know, not everything in our lives is always black and white. Have faith, Le."

The magazine said the couple's affair began March 7 with a romantic lunch at the restaurant Mosun and Club M. in Laguna Beach, Calif. They held hands, laughed and kissed throughout their dinner.

Then on March 14, Rimes was spotted sans wedding ring carrying a copy of the book "For Better or for Worse: Divorce Reconsidered." Later that day, Us Weekly said she'd checked into a $725-a-night suite at the Malibu Beach Inn. An hour later, Cibrian pulled into the parking lot and headed for Rimes' room. They remained inside with a "Do Not Disturb" sign on the door for more than three hours before leaving separately.

Eddie Cibrian with wife Brandi Glanville.

Rimes and Cibrian, who has appeared in episodes of "Samantha Who?" and "Ugly Betty," first met on the set of their television drama "Northern Lights," in which she starred as an Alaskan bush pilot who fell for the new detective in town, played by Cibrian. Through the shoot, which included some steamy love scenes, they became close.

The director Mike Robe told Us: "From the moment we rehearsed, LeAnn and Eddie honestly developed a really strong bond and a warm relationship. I could sense a lot of trust that grew between them. Once I yelled 'cut,' they did have a rapport. They became very good friends."

Various media reports say Rimes' marriage has been in trouble for some time, a product of getting married too young. Rimes wed former backup dancer Sheremet when she was 19.

A friend of the couple told People magazine: "Like any marriage, they've had a couple of rough patches. They've gone to therapy. But they did marry very young and when people marry young it's very difficult to maintain a marriage for the long haul."