'Yolanda and Lisa Vanderpump are two highly narcissistic individuals, who are battling it out to be queen': Lisa Rinna spills on simmering 'war' between her Real Housewives Of Beverly Hills co-stars

Lisa Rinna believed she found the root of all the fighting on The Real Housewives of Beverly Hills on Tuesday and identified Yolanda Foster and Lisa Vanderpump as the source.

Calling everyone else 'pawns in their game' the 52-year-old large-lipped former actress blamed the duo for a whole season of nastiness.

'I see it so clearly, we are all collateral damage' she explained about the 'war' between the British restaurateur and former supermodel.

Dinner drama: Lisa Rinna continued her arguing with Lisa Vanderpump on Tuesday's episode of The Real Housewives Of Beverly Hills during dinner in Dubai

'Two highly narcissistic individuals, who are battling it out to be the queen,' Rinna decided.

'I think it's because of Kyle's dysfunctional relationship with her sisters, that she is unable to pull away from Lisa Vanderpump,' she continued.

Meanwhile, Vanderpump called Rinna 'very erratic' and questioned why Kyle Richards would ever believe her stories.

The feud erupted in Dubai where the women were taking a yacht ride for Kathryn Edwards' 51st birthday party.

Reality star: Lisa Vanderpump insisted that she was misunderstood but it largely fell on deaf ears

Lisa Rinna had been relentlessly complaining about the feud between Vanderpump and Yolanda.

'They hate each other so much they are willing to do anything to get at each other…and I think we are all pawns in their game,' she griped.

The women sat to an awkward, almost silent, dinner until Kyle tried to clear the air.

That's awkward: Kathryn Edwards, Eileen Davidson and Erika Girardi sat down to an awkward dinner

'You guys have barely said one word to each other all day,' she sighed.

'Lisa and Yolanda absolutely have an issue with each other…is that why Lisa wanted the word Munchausen to get out there, but for someone else to say it?' asked Kyle, 47.

Usually a tough cookie, Lisa, 55, began to get emotional.

Getting emotional: The British restaurateur got emotional as the accusations mounted against her

'Do I cry? Of course I do, in fact, let's be honest, some of the people at this table have made me cry before,' she recalled.

Eileen Davidson, 56, sided with Rinna as tension simmered over who started the rumor that Yolanda who has been suffering with Lyme Disease had Munchausen Syndrome.

'I don't understand why Kyle would be willing to throw the rest of us under the bus just not to upset Lisa Vanderpump,' huffed The Young and the Restless star.

Took a side: Eileen Davidson sided with Lisa Rinna after previously tangling with Vanderpump

'Roll your eyes all you want, you're caught,' Rinna snapped at Vanderpump.

Eileen and Kathryn both stormed off to gossip with Erika Girardi. 

That left Vanderpump and Kyle to hash it out at the dinner table.

Hasing it out: Kyle and Vanderpump were left alone to try and hash things out

Tender moment: Kathryn received a birthday call from her mother that left Eileen and Lisa Rinna in tears

Tough time: Lisa Rinna cried as her own mother suffered a stroke two years ago and no longer remembers her bithday

Birthday girl: Kathryn took a break from the drama that occurred during her birthday dinner

'I'm like an abused wife with a black eye,' said Kyle, who claimed she'd been defending Lisa for too long.

'Please say something to justify me sitting here and sticking by you,' she raged.

'I will not f***ing tell a lie,' she shouted, banging her fist on the table.

Too much: Kyle put her hands to her head as the drama mounted during dinner

In the midst of the frostiness they pulled out a birthday cake for Kathryn, who's party had been ruined.

'It's been a very different birthday,' she huffed.

The show opened with the ladies piling into a white Rolls-Royce for an obscenely decadent shopping trip.

'Can we just go and lose our mind in the mall,' begged Erika, who was sick of 'all the fighting'.

They were driven around in golf carts to the myriad designer stores.

Huge mall: The ladies were driven around on golf carts inside a huge mall in Dubai

Vanderpump was worried that Eileen and Lisa Rinna were ignoring her.

'It's a horrible atmosphere,' she complained.

Next was a trip up the highest building in the world – the Burj Khalifa that stands at over 2,700 feet tall.

Tall building: The trip included a visit to the highest building in the world

Kyle and Eileen were scared of heights but took a ride to the top anyway.

Lisa Vanderpump attempted to apologise to Eileen again after getting a lesson from Kyle on how to deliver a sincere apology.

'I'm truly sorry…do you want to throw me off?' she asked cautiously.

Hugged it out: Vanderpump after an apology lesson from Kyle apologised to Eileen and they hugged it out

Back in California, Yolanda went for a picnic with Brandi Glanville, 43, and Kim Richards.

Brandi brought a custom T-shirt for Kim that read 'Medicated'.

'Her sense of humor is not my sense of humour,' tittered Yolanda, who is struggling with chronic Lyme disease. 

Real friends: Yolanda Foster meanwhile enjoyed a picnic with Kim Richards and Brandi Glanville

Gift exchange: Kim was given a T-shirt that read 'Medicated' from Brandi but took it in stride

Kim despite her recent troubles took Brandi's strange gift in stride.

Yolanda sympathised with Kim's alcoholism.

'You don't just shove somebody on the side because they have failed in their sobriety,' she said. 

No shoving: Yolanda said people shouldn't be shoved to the side because they failed in their sobriety

After their heated debate Vanderpump and Kyle remained friends.

'Dubai was fabulous but my travel companions, not so much,' said Vanderpump on their last day.

The season finale of RHOBH will air next week on Bravo. 

Rough trip: Vanderpump loved Dubai but her travel companions not so much