Denise Richards has stopped filming the Real Housewives of Beverly Hills after a nasty showdown with her cast members who confronted her over having a months-long affair with Brandi Glanville, multiple production sources exclusively told DailyMail.com.

The 48-year-old 'has basically walked away from the show' in the wake of the dramatic confrontation, which happened during filming for the new season while the women were on a trip to Rome in late November, sources explained.

Richards and Glanville, 47, had been seeing each other from the beginning of 2019 up until the middle of the year, with Richards telling Glanville that she and her husband Aaron Phypers were in an open marriage, a source said.

But that wasn't the case and now Glanville 'is upset that Denise lied to her,' the insider said, adding: 'Denise claimed to Brandi that she was in an open marriage, but she wasn't and this has hurt Denise's husband Aaron very much.'

The fallout between Richards and her castmates is expected to play out in the upcoming season, which will premiere early this year.

Denise Richards has stopped filming the Real Housewives of Beverly Hills after a nasty showdown with her cast members who confronted her over having a months-long affair with Brandi Glanville, multiple production sources exclusively told DailyMail.com

The 48-year-old 'has basically walked away from the show' in the wake of the dramatic confrontation, a source told DailyMail.com

The showdown happened on a cast trip to Rome in late November, multiple production sources explained. The fallout between Richards and her castmates is expected to play out in the upcoming season, which will premiere early this year. Pictured: RHOBH cast members (l-r) Garcelle Beauvais, Sutton Strackein, Erika Jayne, Kyle Richards, Dorit Kemsley, Teddi Mellencamp, Lisa Rinna and Denise Richards

Another source said: 'I feel really sorry for Aaron as he is a good guy and Denise is crazy for thinking she could have an affair while filming a reality show and get away with it.'

The drama was kicked off when the women, including Lisa Rinna, Kyle Richards, Teddi Mellencamp, Erika Jayne and Dorit Kemsley, as well as newcomers Garcelle Beauvais and Sutton Stracke, took a cast trip in late November to Rome.

At one point, they 'confronted Denise about the alleged nasty things she'd been saying about them,' the insider said.

They continued: 'Denise attempted to brush it off and act innocent, but then the women dropped a bombshell.

'They then confronted Denise about her affair with Brandi.

'The best thing was this was all done on camera and the show's fans will get to see it all go down.'

Another production source said: 'It shocked everyone as Denise constantly boasts about how great her husband is, how much she loves him and how large his penis is.

'Clearly she got over his penis and went for something that was being offered on another menu.'

DailyMail.com has reached out to Glanville and Bravo for comment.

Jill Fritzo, the representative for Richards, said: 'The story isn't true.'

Richards and Glanville, 47, had been seeing each other from the beginning of 2019 up until the middle of the year, with Richards telling Glanville that she and her husband Aaron Phypers were in an open marriage, a source said. But that wasn't the case and now Glanville 'is upset that Denise lied to her,' the insider said, adding: 'Denise claimed to Brandi that she was in an open marriage, but she wasn't and this has hurt Denise's husband Aaron very much'

Another production source said: 'It shocked everyone as Denise constantly boasts about how great her husband is and how much she loves him.' Richards, who was married to actor Charlie Sheen from 2002 to 2006, began dating Phypers (pictured together) in December 2017 and they quickly got married in September 2018

Richards, who was married to actor Charlie Sheen from 2002 to 2006, began dating Phypers in December 2017 and they quickly got married in September 2018.

Her Instagram feed is filled with their loved-up pictures and in November she posted a photo of him, writing: 'Love this man so much working so hard & holding down the fort while I'm out of town.'

The feud has possibly boiled over onto social media with Glanville sending out a series of furious tweets, seemingly aimed at Richards.

On December 29, she tweeted, 'I just got 'Denised''', before adding, 'Seriously b***h???? You wanna play. 1-blackmail is illegal, 2-I have no skeletons in my closet (they're all on the internet), 3-slut shaming is soooooo last year.'

A third source said: 'Since the affair was exposed, Denise has basically walked away from the show.

'Everyone in Beverly Hills knows about it. It was the talk of Kathy Hilton's Christmas party.'

Richards has been MIA for filming key scenes for the upcoming 10th season of the show, which is set for a premiere in early 2020.

On Sunday, she posted a picture on her Instagram saying she was jetting off to Europe, explaining she was working on an 'exciting project.'

She posed for photos at an event in Madrid, Spain on Wednesday evening.

On Sunday, Richards posted a picture on her Instagram saying she was jetting off to Europe, explaining she was working on an 'exciting project.' She posed for photos at an event in Madrid, Spain on Wednesday evening (pictured)

The feud has possibly boiled over onto social media with Glanville sending out a series of furious tweets, seemingly aimed at Richards

On December 29, she tweeted, 'I just got 'Denised''', before saying, 'Seriously b***h???? You wanna play.'

She added: '1-blackmail is illegal, 2-I have no skeletons in my closet (they're all on the internet), 3-slut shaming is soooooo last year'

The insider explained: 'The cast of the show had just filmed a big cast party at Dorit and PK's new home that they allegedly own, and afterwards headed to Kathy and Rick's party.

'Denise was a no show at either and that's when all of Beverly Hills found out.

'It's extraordinary that it's been kept a secret for this long.'

Rinna appeared to fire a sarcastic shot at Richards after missing the event with a comment on Richard's Instagram post about a health scare she had in mid-December.

She wrote: 'Denise are you ok? You never showed up to Dorit's Sat night we were all so worried about you. What happened?! You said you were coming, you were meeting Garcelle, We never heard from you. What happened?'

Richards even skipped Teddi Mellencamp's baby shower, with a production source adding: 'These are all key moments on the show that contractually she should be filming.

'Bravo should just step in and fire her as she's not turning up for her job.'

A cast member of another Bravo show told DailyMail.com: 'This was the talk at Bravo Con, I'm shocked it's taken this long for it to come out.

'I think the talk of the Lisa Rinna and Denise Richards feud was just a cover for this. This is the real drama that's happening on the show.'