The 43-year-old reality star called out the 33-year-old singer on the Nik Richie Podcast this week, claiming Rimes posted photos with Glanville's sons after being asked not to.
Glanville shares 12-year-old Mason and 8-year-old Jake with ex-husband Eddie Cibrian, who married Rimes in 2011.
"Holidays are so hard for me, as it is, when I don't have my kids," the star admitted. "I get that vodka out, or whatever it is. I'll break out three bottles of chardonnay, cry myself to sleep and look at what they're doing on Christmas ... It's Christmas and that's my family."
"She knows [the photos bother me]," she added.
"I told her, 'It doesn't make me mad, it hurts my feelings. It hurts my heart.' It's the holidays. I'm missing half their life as it is. I tucked my tail and I said, 'Please, just on the holidays, don't do it. It kills me.' She was like, 'It's my family, too, and I'm going to do whatever I want."
Glanville and Cibrian married in 2001, and divorced in 2009 after the 42-year-old actor had an affair with Rimes. Cibrian responded to his ex-wife's claims Wednesday, telling People magazine Glanville "is lying" about Rimes for "the sake of publicity."
"She has to bring in my wife unfortunately for it to make headlines," he said. "It isn't fair. She never asked LeAnn to not post pictures of the kids during the holidays, ever. They don't even talk! ... It's unfair to LeAnn. What has she done? Nothing, but love the children."
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"She sees the kids as much as I do," he added of Glanville. "She was with them for Christmas Eve and Christmas Day. And I miss my kids tremendously when they're not with me, but I don't ask her to not post pictures ... One day, I hope [the drama] goes away, because it's been long enough."
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