LeAnn Rimes' ex-husband Dean Sheremet details her cheating, blasts Eddie Cibrian

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LeAnn Rimes' ex-husband Dean Sheremet details her cheating, blasts Eddie Cibrian
LOS ANGELES, CA - FEBRUARY 08: Singer LeAnn Rimes (R) and husband Dean Sheremet arrive to the 51st Annual GRAMMY Awards at the Staples Center on February 8, 2009 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
NASHVILLE, TN - OCTOBER 13: LeAnn Rimes and Dean Sheremet on The Red Carpet at the 46th Annual ASCAP Country Music Awards at the Ryman Auditorium on October 13, 2008 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images)
NASHVILLE, TN - OCTOBER 13: Dean Sheremet and LeAnn Rimes on The Red Carpet at the 46th Annual ASCAP Country Music Awards at the Ryman Auditorium on October 13, 2008 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images)
NASHVILLE, TN - OCTOBER 13: LeAnn Rimes and Dean Sheremet on The Red Carpet at the 46th Annual ASCAP Country Music Awards at the Ryman Auditorium on October 13, 2008 in Nashville, Tennessee. (Photo by Rick Diamond/Getty Images)
LAS VEGAS - MAY 18: Singer LeAnn Rimes and dancer Dean Sheremet arrive at the 43rd Academy of Country Music Awards at The MGM Grand Garden Arena on May 18, 2008 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
NASHVILLE, TN - APRIL 14: Singer LeAnn Rimes and husband actor Dean Sheremet attend the 2008 CMT Music Awards at the Curb Events Center at Belmont University on April 14, 2008 in Nashville, Tennessee. (Photo by Jon Kopaloff/FilmMagic)
LeAnn Rimes (right) and husband Dean Sheremet during 2007 CMT Music Awards - Arrivals at The Curb Event Center at Belmont University in Nashville, Tennessee, United States. (Photo by Tony R. Phipps/WireImage)
LeAnn Rimes and husband Dean Sheremet during 2007 CMT Music Awards - Red Carpet at The Curb Event Center at Belmont University in Nashville, Tennessee, United States. (Photo by Jeff Kravitz/FilmMagic)
NEW YORK - SEPTEMBER 06: Recording artist LeAnn Rimes and her husband, Dean Sheremet attend the Conde Nast Media Group's Fourth Annual Fashion Rocks Concert at Radio City Music Hall September 6, 2007 in New York City. (Photo by Peter Kramer/Getty Images)
Singer LeAnn Rimes and husband actor Dean Sheremet attend the 2008 CMT Music Awards at the Curb Events Center at Belmont University on April 14, 2008 in Nashville, Tennessee. (Photo by Jon Kopaloff/FilmMagic)
(EXCLUSIVE, Premium Rates Apply) RUTLEDGE, GA - AUGUST 07: Award-winning, Multi Platinum Country recording artist LeAnn Rimes and husband Dean Sheremet during filming for 'Good Intentions' on August 7,2007 in Atlanta, Georgia. ****EXCLUSIVE**** (Photo by Rick Diamond/WireImage)
NEW YORK - SEPTEMBER 11: Singer LeAnn Rimes, husband Dean Sheremet (left) and actress Michelle Trachtenberg front row at Monique Lhuillier Spring 2008 Collection during Mercedes-Benz Fashion Week in The Promenade at Bryant Park on September 11, 2007 in New York City. (Photo by Michael Tran/FilmMagic)
NEW YORK - SEPTEMBER 18: Dean Sheremet (R) and singer LeAnn Rimes (L) attend the New Yorkers For Children Annual Fall Gala at 583 Park on September 18, 2007 in New York City. (Photo by Amy Sussman/Getty Images)
(EXCLUSIVE, Premium Rates Apply) LeAnn Rimes and husband Dean Sheremet *EXCLUSIVE* (Photo by Kevin Mazur/WireImage)
Singer/Songwriter LeAnn Rimes and Dean Sheremet arrive at the 41st Annual CMA Awards at the Sommet Center on November 7, 2007 in Nashville TN. (Photo by Michael Loccisano/FilmMagic)
Singer/Songwriter LeAnn Rimes and Dean Sheremet arrive at the 41st Annual CMA Awards at the Sommet Center on November 7, 2007 in Nashville TN. (Photo by Michael Loccisano/FilmMagic)
LAS VEGAS - MAY 18: ***EXCLUSIVE ACCESS*** Musician LeAnn Rimes and Dean Sheremet backstage at the 43rd annual Academy Of Country Music Awards held at the MGM Grand Garden Arena on May 18, 2008 in Las Vegas, Nevada. (Photo by Frazer Harrison/ACMA/Getty Images for ACMA)
LeAnn Rimes and Dean Sheremet during Celebrity Sightings at Koi - February 13, 2007 at Koi in West Hollywood, California, United States. (Photo by Chris Wolf/FilmMagic)
Dean Sheremet and LeAnn Rimes, nominee Best Female Country Vocal Performance for 'Something's Gotta Give' (Photo by Jon Kopaloff/FilmMagic)
Dean Sheremet and LeAnn Rimes (Photo by Dan MacMedan/WireImage)
Dean Sheremet and LeAnn Rimes (Photo by Gregg DeGuire/WireImage)
Dean Sheremet and LeAnn Rimes, nominee Best Female Country Vocal Performance for 'Something's Gotta Give' (Photo by Jon Kopaloff/FilmMagic)
LeAnn Rimes and Dean Sheremet during The 40th Annual CMA Awards - Arrivals at Gaylord Entertainment Center in Nashville, Tennessee, United States. (Photo by Rick Diamond/WireImage)
LeAnn Rimes and Dean Sheremet during CMT Giants Honoring Reba McEntire - Red Carpet at Kodak Theater in Hollywood, California, United States. (Photo by Chris Polk/FilmMagic)
NEW YORK - SEPTEMBER 21: Singer LeAnn Rimes and husband Dean Sheremet attend the New Yorkers For Children annual fall gala dinner at Cipriani's 42nd Street September 21, 2006 in New York City. (Photo by Evan Agostini/Getty Images)
LeAnn Rimes and Dean Sheremet during 44th Annual ASCAP Country Music Awards - Show at Ryman Theater in Nashville, TN., United States. (Photo by Rick Diamond/WireImage)
HOLLYWOOD - OCTOBER 26: Singer LeAnn Rimes and husband Dean Sheremet arrive at Country Music Television's CMT Giants honoring Reba McEntire at the Kodak Theatre on October 26, 2006 in Hollywood, California. (Photo by Michael Buckner/Getty Images)
NEW YORK - SEPTEMBER 14: Singer LeAnn Rimes (R) and her husband Dean Sheremet Spring 2007 Fashion show during Olympus Fashion Week in The Promenade in Bryant Park September 14, 2006 in New York City. (Photo by Mat Szwajkos/Getty Images For IMG)
Dean Sheremet, LeAnn Rimes, Joel Madden and Hilary Duff (Photo by Jamie McCarthy/WireImage)
Rob Thomas, Marisol Thomas, LeAnn Rimes and Dean Sheremet (Photo by Jamie McCarthy/WireImage)
Dean Sheremet and LeAnn Rimes during The Cinema Society and Guerlain Present a Screening of 'The Black Dahlia' - Arrivals at Tribeca Grand Screening Room in New York City, New York, United States. (Photo by Jamie McCarthy/WireImage)
NEW YORK - SEPTEMBER 13: Singer LeAnn Rimes and husband Dean Sheremet attend a special screening of 'The Black Dahlia' hosted by The Cinema Society & Guerlain on September 13, 2006 in New York City. (Photo by Peter Kramer/Getty Images)
LeAnn Rimes and Dean Sheremet during Olympus Fashion Week Spring 2007 - Monique Lhuillier - Front Row and Backstage at The Promenade, Bryant Park in New York City, New York, United States. (Photo by G. Gershoff/WireImage)
Leann Rimes, Dean Sheremet and Zooey Deschanel (Photo by Dimitrios Kambouris/WireImage for Marc Jacobs)
NEW YORK - MARCH 3: LeAnn Rimes is introduced as the new spokesperson for the JCPenney Wedding Registry March 3, 2006 in New York City. (Photo by Arnaldo Magnani/Getty Images)
LeAnn Rimes and Dean Sheremet during JCPenney Introduces LeAnn Rimes as the New Face of JCPenney Wedding Registry at JCPenney - Times Square in New York City, New York, United States. (Photo by J. Kempin/FilmMagic)
Dean Sheremet and LeAnn Rimes during Olympus Fashion Week Fall 2006 - Zac Posen - Front Row and Backstage at Bryant Park in New York City, New York, United States. (Photo by Michael Loccisano/FilmMagic)
Dean Sheremet and LeAnn Rimes during Olympus Fashion Week Fall 2006 - J. Mendel - Front Row and Backstage at Bryant Park in New York City, New York, United States. (Photo by Lisa Mauceri/FilmMagic)
Dean Sheremet and LeAnn Rimes during Olympus Fashion Week Spring 2006 - Zac Posen - Arrivals at Bryant Park in New York, NY, United States. (Photo by Lawrence Lucier/FilmMagic)
NEW YORK - FEBRUARY 09: Dean Sheremet and LeAnn Rimes backstage at the Zac Posen Fall 2006 fashion show during Olympus Fashion Week at Bryant Park February 9, 2006 in New York City. (Photo by Astrid Stawiarz/Getty Images) (Photo by Astrid Stawiarz/Getty Images)
NEW YORK - FEBRUARY 08: LeAnn Rimes and her husband, Dean Sheremet attend the Michael Kors Fall 2006 fashion show at Bryant Park during Olympus Fashion Week in New York City. (Photo by Evan Agostini/Getty Images)
Dean Sheremet and LeAnn Rimes during The 39th Annual CMA Awards - Arrivals at Madison Square Garden in New York City, New York, United States. (Photo by Michael Loccisano/FilmMagic)
NEW YORK - NOVEMBER 14: Musician LeAnn Rimes and husband Dean Sheremet attend the welcome reception for the nominees of the 39th CMA Awards hosted by Mayor Michael Bloomberg at Gracie Mansion November 14, 2005 in New York City. (Photo by Mat Szwajkos/Getty Images)
LeAnn Rimes and Dean Sheremet during CFDA 7th on Sale Kick-Off - Red Carpet and Inside at Sky Light Studios in New York City, New York, United States. (Photo by Rabbani and Solimene Photography/WireImage for LaForce and Stevens)
NEW YORK - NOVEMBER 13: Singer LeAnn Rimes and her husband Dean Sheremet attend the premiere of 'Walk The Line' at the Beacon Theater November 13, 2005 in New York City. (Photo by Evan Agostini/Getty Images for Fox Studios)
LeAnn Rimes and husband Dean Sheremet during Lauren Family Sighting in the West Village of New York City - November 10, 2005 at West Village in New York, NY, United States. (Photo by Lawrence Lucier/FilmMagic)
LeAnn Rimes and husband Dean Sheremet during 8th Annual Lili Claire Foundation Benefit - Red Carpet at The Beverly Hilton in Beverly Hills, California, United States. (Photo by M. Caulfield/WireImage for Fusion PR _LA)
LeAnn Rimes and Dean Sheremet during 8th Annual Lili Claire Foundation Benefit - Red Carpet at The Beverly Hilton in Beverly Hills, California, United States. (Photo by E. Charbonneau/WireImage for Fusion PR _LA)
Dean Sheremet and LeAnn Rimes during Society of Singers 14th Annual Awards Honoring Sir Elton John at Beverly Hilton Hotel in Beverly Hills, California, United States. (Photo by Jean-Paul Aussenard/WireImage)
BEVERLY HILLS, CA - OCTOBER 10: Singer LeAnn Rimes and husband Dean Sheremet arrive at the Society of Singers 14th Annual Ella Award honoring Sir Elton John at the Beverly Hilton Hotel on October 10, 2005 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
DENVER - FEBRUARY 20: Singer LeAnn Rimes and husband Dean Sheremet attend the 2005 NBA All Star Game at the Pepsi Center on February 20, 2005 in Denver, Colorado. (Photo by Frank Micelotta/Getty Images)
LAS VEGAS - MAY 26: Singer Leann Rimes and husband Dean Sheremet at the Distinctive Assets lounge for the 'Country Music Awards' on May 26, 2004 in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)
NASHVILLE, TN - NOVEMBER 9: Singer LeAnn Rimes and her husband Dean Sheremet arrive at the 38th Annual CMA Awards at the Grand Ole Opry House November 9, 2004 in Nashville, Tennessee. (Photo by Frank Micelotta/Getty Images)
LeAnn Rimes and Dean Sheremet during 'Legally Blonde 2 Red, White & Blonde' - Premiere, New York City - Inside Arrivals at Ziegfeld Theater in New York City, New York, United States. (Photo by KMazur/WireImage)
Singer, LeAnn Rimes with her husband, Dean Sheremet (Photo by Kevin Kane/WireImage)
LAS VEGAS - MAY 26: Musician LeAnn Rimes (L) and her Husband Dean Sheremet attend the '39th Annual Country Music Awards' at the Mandalay Bay Hotel & Casino on May 26, 2004 in Las Vegas, Nevada. (Photo by Frederick M. Brown/Getty Images)
NASHVILLE, TN - NOVEMBER 9: Singer Leann Rimes and her husband Dean Sheremet arrive at the 38th Annual CMA Awards at the Grand Ole Opry House November 9, 2004 in Nashville, Tennessee. (Photo by Rusty Russell/Getty Images)
LeAnn Rimes and Dean Sheremet during CMT Hosts the 'Elizabethtown' Movie Premiere - Arrivals at Franklin Cinema in Nashville, Tennessee, United States. (Photo by Rob Hill/FilmMagic for Country Music Television)
NEW YORK - JUNE 30: (U.S. TABS AND HOLLYWOOD REPORTER OUT) Singer Leann Rimes and husband Dean Sheremet attend the 'Legally Blonde 2: Red, White and Blonde' film premiere after-party at Christie's on June 30, 2003 in New York City. (Photo by Evan Agostini/Getty Images)
LeAnn Rimes and Dean Sheremet during Legally Blonde 2 Red, White & Blonde - Special Screening in Southampton, New York - After Party at Hampton Hall in Southampton, New York, United States. (Photo by James Devaney/WireImage)
LeAnn Rimes and husband Dean Sheremet during 38th Annual Academy of Country Music Awards - Arrivals at Mandalay Bay Events Center in Las Vegas, Nevada, United States. (Photo by Bill Davila/FilmMagic)
LeAnn Rimes and husband Dean Sheremet during The World Premiere of 'Bruce Almighty' at Universal Amphitheatre in Universal City, California, United States. (Photo by SGranitz/WireImage)
LeAnn Rimes and Dean Sheremet during Legally Blonde 2 Red, White & Blonde - Special Screening in Southampton, New York at United Artists Southampton Theatre in Southampton, New York, United States. (Photo by James Devaney/WireImage)
Dean Sheremet and LeAnn Rimes during 'Poolhall Junkies' Premiere In Memory of Rod Steiger to Benefit The Motion Picture & Television Fund at ArcLight Theatre in Hollywood, California, United States. (Photo by Jean-Paul Aussenard/WireImage)
Dean Sheremet & LeAnn Rimes during Miramax 2003 Golden Globes Party Sponsored by Glamour Magazine and Coors at Trader Vic's in Beverly Hills, CA, United States. ***Exclusive*** (Photo by Jeff Kravitz/FilmMagic)
LeAnn Rimes and husband Dean Sheremet during The 30th Annual American Music Awards - Arrivals at Shrine Auditorium in Los Angeles, California, United States. (Photo by Jeffrey Mayer/WireImage)
LeAnn Rimes, Dean Sheremet, David Furnish and Sir Elton John (Photo by M. Caulfield/WireImage)
Dean Sheremet and LeAnn Rimes during 38th Annual Academy of Country Music Awards - Nomination Announcements at Tiffany & Co. in Beverly Hills, California, United States. (Photo by Ron Wolfson/WireImage)
LeAnn Rimes & Dean Sheremet during 'Four Feathers' Premiere at Mann Bruin in Los Angeles, California, United States. (Photo by Jeff Kravitz/FilmMagic, Inc)
Dean Sheremet & LeAnn Rimes during 'The Four Feathers' Premiere - Los Angeles at Mann Village Theatre in Westwood, California, United States. (Photo by Gregg DeGuire/WireImage)
LeAnn Rimes and husband Dean Sheremet during The 37th Annual Academy of Country Music Awards - Arrivals at Universal Amphitheater in Universal City, California, United States. (Photo by SGranitz/WireImage)
LeAnn Rimes & husband Dean Sheremet during 'Spider-Man' Premiere at Mann Village in Westwood, California, United States. (Photo by Gregg DeGuire/WireImage)
American country and pop singer LeAnn Rimes and husband Dean Sheremet arrive for the premiere of 'Spider Man' at the Mann Village in Westwood, California, April 29, 2002. photo by Kevin Winter/ImageDirect
LeAnn Rimes and Dean Sheremet during The 10th Annual Elton John AIDS Foundation InStyle Party - Arrivals at Moomba Restaurant in Hollywood, California, United States. (Photo by Theo Wargo/WireImage)
LOS ANGELES - JANUARY 9: Singer LeAnn Rimes and boyfriend Dean Sheremet attend the 29th Annual American Music Awards on January 9, 2002 at the Shrine Auditorium in Los Angeles, California. (Photo by Ron Galella, Ltd./WireImage)
LeAnn Rimes & Dean Sheremet arrive at the 29th Annual American Music Awards January 9, 2002 at the Shrine Auditorium in Los Angeles. (Photo by KMazur/WireImage)
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Looks like LeAnn Rimes and her first husband, Dean Sheremet, are not exactly friendly exes.

Sheremet, who was married to Rimes for 7 years before splitting in 2009 after the 32-year-old "How Do I Live" singer had an affair with an also then-married Eddie Cibrian, is now telling all in a lengthy interview with Nat's Next Adventure. The former backup dancer talks in-depth about his marriage with the country superstar, specifically, when it all went wrong. Even before the affair, Sheremet says that there were a lot of "animosities that built up" between the two -- mainly because he claims he was also involved in every aspect of her career.

"I felt like I was never having my needs met so there was fighting," he reveals. "And I was so intertwined in managing her career that I didn't know how to make the distinction between husband and boss, husband and partner, husband and manager... I was husband, father, friend, lover, manager. There were so many hats and I didn't know what hat to wear when."

"Unfortunately, I think the business ended up destroying us," he stresses. "That passion for our marriage wasn't there. The person that I needed to be, the person I should have been, I wasn't. I wasn't the person she came home to and unloaded on. And, then, of course, I was thinking, I haven't done what I've wanted to do in over eight years."

PHOTOS: Biggest Celebrity Cheating Scandals

Still, he was blindsided by her affair with Cibrian, her Northern Lights co-star.

"Never in a million years did I think something like that would have happened," he admits, also sharing that it was he who encouraged Rimes to star in the 2009 Lifetime film in the first place. "The need for me in her life was so strong. There were things she couldn't do without me. She had her own phone but never used it. People would call me to get to her. Everything went through me."

He says he never felt threatened by the 41-year-old CSI: Miami actor, though he admits he's a "good looking guy" and "charming."

"I just remember being like, 'Oh, God, just another one of those Hollywood pretty boys,'" he recalls. "If you're in a room with him, he's probably one of the most charming people you'll ever meet. But I wouldn't trust him as far as I could throw this f**king table. He just felt like one of those guys from the beginning. A total schmoozer. Very Hollywood. I never bought his shtick. But I wasn't worried."

He remembers the exact moment when he knew the nature of his relationship with Rimes had changed. After he got sick and had to leave the Lifetime TV movie set for a week, he says there was a "huge shift" upon his return.

"There was this bar that everyone hung out at after set and I remember coming down the stairs and seeing the two of them shooting pool together," he recalls. "I could just tell by the body language that everything had changed. She's shooting pool, shooting tequila, in a tight tank, tight jeans, over the knee boots and she's standing across from him, playing with the pool cue. All of a sudden, there was a huge shift. My stomach dropped. I literally felt like I got hit."

"I totally felt foolish," he says about eventually leaving the set for good when the tension became too much. "I felt like this pathetic husband hanging around. I was very aware of how others were looking at me. ... I was like, 'Why am I here? I don't need to be babysitting someone on set.' Even though in my brain, I was like, 'I'm seeing this happening, I should be here and do something.' But I wasn't going to be able to stop anything that happened. And I wasn't doing anyone any good."

He clearly still has some resentment over the situation.

"The dumbest thing she ever did for her career was divorce me, because we were such a good team. The last hit song she had was when she was with me," he says bluntly, referencing her song "Nothing Better to Do," which they wrote together.

"It's funny, I don't remember seeing that on my SAG screeners that year," he also cracks about Northern Lights.

As for Rimes' controversial turn after their split -- including a VH1 reality show with Cibrian that got canceled after one season and a very public feud with Eddie's ex-wife, Real Housewives of Beverly Hills star Brandi Glanville -- Sheremet says he actually "sympathizes" with her.

"She really lives on the adoration of others. I could be speaking out of turn but this is my perspective," he muses. "She lives and dies on the perception of herself. I sympathize with that cause she's been famous since she was 12 years old so she doesn't know anything else. In L.A., there's the paparazzi and that false sense of success, false security that you're still relevant. If you're in the magazines, then you matter. And that carried over to the divorce. She became even more 'famous.'"

"She's one of the most talented people I've ever met, has the most incredible voice, she's flawless," he adds. "But she got away from doing that and it breaks my heart. She's gone away from what she was put on this earth to do. It's all been at the expense of that. I think she learned a really hard lesson because it didn't pan out the way she wanted it to."

VIDEO: LeAnn Rimes -- 'A Bully Tied to Kill Me'

In January 2013, ET caught up with a similarly candid Rimes, who opened up about infidelity.

Watch below:

LeAnn Rimes Talks Affair With Eddie Cibrian and Ex Dean Sheremet

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