Eddie Cibrian’s Ex “Couldn’t Care Less” About LeAnn Rimes Engagement

 Jacob Andrzejczak/Getty Images; Denise Truscello/WireImage.com

Guess Brandi Glanville won't be sending a bottle of champagne to her ex-husband Eddie Cibrian and his brand-new fiancee LeAnn Rimes.

An insider close to Glanville — whose marriage to the actor went down in flames last year following his affair with Rimes — tells UsMagazine.com what she thinks of Cibrian's engagement to the 28-year-old singer, announced Monday.

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"Brandi knew this was coming for a while, but after everything she's been through since finding out, she couldn't care less. LeAnn has gotten exactly what she wanted from the get go," the source says. Us Weekly was first to break the story of Rimes and Cibrian's affair, which began on the set of their 2009 Lifetime flick Northern Lights.

Former model Glanville was married to Cibrian, 38, for 8 years, and they have two sons together: Mason, 7, and Jake, 3. Their divorce was finalized in August; Rimes' 7-year marriage to Dean Sheremet official ended this time last year. (Sheremet himself is engaged to girlfriend Sarah Silver.)

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The insider continues: "[Brandi] never wanted Eddie back, so it didn't matter if they got engaged, broke up or whatever. But now he's LeAnn's problem."

The source warns: "She can wonder what he's doing on those boys-only trips, who he's always texting, who's at his poker nights. As long as she continues to be good to her two boys, it doesn't matter to Brandi."

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Mason and Jake moved in with their dad into Rimes' Malibu home over the summer. "LeAnn should keep her eyes open," the insider says. "A tiger never loses his stripes."

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