Brandi Glanville shockingly says she once threatened to kill LeAnn Rimes.

The former "RHOBH" star recalled telling Rimes that she would "murder" her after finding out the singer was having an affair with her then-husband, Eddie Cibrian.

"One time, before they were married, I walked up to a soccer game and [Glanville’s son] Jake, who was 2, was sitting in her lap," Glanville wrote in a new op-ed for the Sun. "I had this rage in my body. I really wanted to kill her.

"I walked over to her, grabbed Jake and I looked at her and said: ‘I will f—ing murder you.'"

BRANDI GLANVILLE SAYS SHE AND LEANN RIMES ARE ‘LIKE SISTER WIVES’ AFTER A ‘DECADE OF FIGHTING’

LOS ANGELES, CALIFORNIA - JANUARY 24: (L-R) LeAnn Rimes and Eddie Cibrian attend MusiCares Person of the Year honoring Aerosmith at West Hall at Los Angeles Convention Center on January 24, 2020 in Los Angeles, California. 

LOS ANGELES, CALIFORNIA - JANUARY 24: (L-R) LeAnn Rimes and Eddie Cibrian attend MusiCares Person of the Year honoring Aerosmith at West Hall at Los Angeles Convention Center on January 24, 2020 in Los Angeles, California.  ((Photo by Jeff Kravitz/FilmMagic))

She noted that she "didn’t cope well" with the end of her marriage, writing: "I was angry, I was drinking — Chardonnay was my crutch. I was so mad at Eddie for blowing up our life together."

Glanville, 48, and Cibrian, 48, split in 2009 after eight years of marriage and 13 years together. Cibrian met and started seeing Rimes — who was also married at the time, to Dean Sheremet — on the set of the 2009 Lifetime movie "Northern Lights."

Cibrian and Rimes, 38, went on to tie the knot in 2011 after they were both divorced.

Glanville noted in her op-ed that her relationship with Cibrian and Rimes has changed for the better over the years.

"These days, I love LeAnn … she’s great and we all hang out together," she wrote. "I’ve forgiven her. We’re going to be around each other for ever because of the kids, so why not make the best of it?

"Eddie and I still squabble, but it’s like the three of us are doing the parenting — it’s nice to have a third person and she’s usually on my side."

BRANDI GLANVILLE RECOVERING FROM SECOND-DEGREE BURNS AFTER PSORIASIS TREATMENT MISHAP

Brandi Glanville recently insisted she and LeAnn Rimes are now on good terms.

Brandi Glanville recently insisted she and LeAnn Rimes are now on good terms. (Paul Archuleta/Getty Images)

She recently quipped on a podcast that she and Rimes are like "sister wives."

She also confessed that she "will always have trust issues because of what happened" with her husband.

She also said her ordeal with Cibrian inspired her to come forward in 2020 about her alleged fling with "The Real Housewives of Beverly Hills" star Denise Richards.

"I don’t like cheaters and in this instance, I felt like I was on the other side of things and that I was a cheater because Denise has a husband, Aaron Phypers," Glanville claimed. "Not telling anyone was eating me alive, so I just had to get it out so I could breathe. Now I’m over it and people need to get over it too."

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Glanville said she and Richards have not spoken since Glanville’s bombshell but that she’d like to talk to Richards.

Richards adamantly denied Glanville’s claims both on- and off-camera.