'Our friendship is messed up':  Vicki Gunvalson and Shannon Beador get heated in sneak peek of next RHOC

• e-mail

Since Vicki Gunvalson had a brush with death in a dune buggy accident, tensions have been brewing with Shannon Beador. 

Vicki confronted her Real Housewives of Orange County co-star for failing to visit her in hospital. 

In a sneak peek of an heated exchange on Monday's episode, the 54-year-old told Shannon, 51, that she made a mistake, reports Us Weekly. 

Let down: Vicki Gunvalson confronted her Real Housewives of Orange County co-star for failing to visit her in hospital

Shannon is seen calling Vicki over to her at Heather Dubrow's book launch party, after recently leaving her a voicemail message to apologise for not visiting her.

'You don't need to say thank you [for me calling] because I should have reached out earlier, but I wish you would have at least called me back,' Beador told the insurance maven.

'I didn't know how bad it was,' she excused herself. 

Tension: In a heated exchange on Monday's episode, the 54-year-old had a heated exhanged with Shannon, reports Us Weekly

'I'm doing good,' Vicki graciously lets her know, before Shannon glibly added: 'Well, I'm glad to hear you're better.'

Vicki looked to be trying to maintain her composure before she responded: ' You messed up, Shannon. Our friendship's messed up.'

'We've already talked about it, I've said my piece', pleaded Shannon. 

'I haven't said mine,' Vicki firmly explained, as she told her that she didn't want to discuss the issue at the party. 

Over it: Vicki looked to be trying to maintain her composure before she responded: ' You messed up, Shannon. Our friendship's messed up'

Recovering: 'I'm doing good,' Vicki graciously lets her know about her injuries

Heating up: The conversation escalates after Shannon doesn't leave it at Vicki's request, with her dragging up an argument between Vicki and her husband David Beador

Apology: Shannon is seen calling Vicki over to her at Heather Dubrow's book launch party, after recently leaving her a voicemail message to apologise for not visiting her in hospital

Argument: 'You don't need to say thank you [for me calling] because I should have reached out earlier, but I wish you would have at least called me back,' Beador told the insurance maven

The reality star had been airlifted to medical facilities after Tamra Judge crashed their ATV on the Imperial Sand Dunes in Glamis, California. 

Vicki was pumped full of morphine, and wore a neck brace, but no kind souls visited her bedside.

'I'm not friends with Vicki, she's been nothing but horrible to me,' squawked Shannon at the time. 

'I would have died by myself,' Vicki said at the time after being left alone in the hospital for many hours.

'Then I thought, well I'm lying here naked and I have no clothes,' as she had no one to bring her fresh clothes after the paramedics removed the ones she'd been wearing.

Left alone: Vicki tells the camera: 'I think Shannon's voicemail message was just to save face. It took for me to get helicoptered out! For her to leave a voicemail message weeks later - I mean, who does that?'

At the time, Shannon and Meghan King Edmonds vocalised their doubts to the authenticity of Vicki's injuries. 

On Monday's show Vicki tells the camera: 'I think Shannon's voicemail message was just to save face. It took for me to get helicoptered out! For her to leave a voicemail message weeks later - I mean, who does that?'

The conversation escalates after Shannon doesn't leave it at Vicki's request, with her dragging up an argument between Vicki and her husband David Beador. 

'I'm not going to get into what you've been saying about my husband,' Shannon told her. 

'He called me a pig! He's a piece of s***', she responded, as the friendship looked farther and farther away from harmony. 

Nasty accident: Tamra Judge crashed their ATV on the Imperial Sand Dunes in Glamis, California

Tough times: Vicki was pumped full of morphine, and wore a neck brace, but no one visited her bedside

Choppered out: The reality star had been airlifted to medical facilities

David went nose-to-nose with Vicki at a 1970s party earlier in the season. 

'You lied about cancer…you're a scumbag,' he snorted.

Adding: 'You're the lowest of the low'.

Vicki's retort was: 'Shame on you, you're filthy, you're a cheater and a bad guy'. 

Vicki left with Kelly Dodd and telephoned her nefarious ex, Brooks Ayers, en route.

'This is filthy and disgusting, I loved you and I believed you…call me back,' she begged to his voicemail.

The Real Housewives of Orange County airs on Bravo Mondays at 9 p.m. ET.