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Kyle Richards launched a polemic against Lisa Rinna on The Real Housewives Of Beverly Hills on Tuesday for badmouthing her sister Kim.

She was first annoyed with Eden Sassoon for questioning Kim's sobriety, but became incandescent when she learned the rumors originated with Rinna.

The show opened with newbie Eden visiting Lisa Vanderpump to discus Kyle and Kim Richards.

Getting angry: Kyle Richards was incensed at Lisa Rinna for spreading rumors about her sister Kim's sobriety on Tuesday's episode of The Real Housewives Of Beverly Hills

'Why do you have to be that involved?' asked Vanderpump frostily, as Eden said that she had 'never' doubted Kim's sobriety.

'It was Rinna [that] said to me ''I don't think she's sober'',' protested Eden, who is the daughter of hair mogul Vidal Sassoon.

'Kyle's guilt came up…and the fact that she ''enables her'',' added the 33-year-old actress.

Big mouth: Rinna told Eden Sassoon that she believed Kim was not sober and alarmingly said she was close to death

Adding: 'She said that she's near death'.

'How could she say that?' balked Vanderpump, noting that Rinna has 'a big mouth'.

'I am going to defend you now,' Vanderpump told Eden resolutely.

Cleared up: Eden told Lisa Vanderpump that she got her information on Kim from Rinna

Meanwhile, Kyle told Rinna that Eden 'could be as annoying as f***' for meddling in her family business too often.

Vanderpump soon informed Kyle that the rumors had stemmed from Rinna's gossip.

'Lisa Rinna is creating her own story, knowing f***ing nothing,' raged Kyle, 48.

Loyal friend: Vanderpump immediately told Kyle that Rinna was spreading the rumor

Candid conversation: Kyle grew angry as Vanderpump gave her the details

'Lisa Rinna needs to sew her f***ing lips shut,' she added.

'You'd need a lot of thread,' joked Vanderpump, 56.

The trouble was percolating in the idyllic setting of Punta Mita, Mexico.

Sewing job: The RHOBH veteran said that Rinna needed to sew her lips shut

Idyllic setting: The drama went down as the ladies were relaxing together in Punta Mita, Mexico

Ocean view: Kyle's husband Mauricio Umansky was opening a new real estate office in Punta Mita and they invited friends down for the grand opening

The crew had taken a margarita-fueled trip to Casa Cuixa – Mauricio Umansky's luxury rental villa.

During dinner on the first night Dorit Kemsley told everyone that Rinna likes to 'pop Xanax in her smoothies'.

'She took out a ziplock bag with all these pills,' she divulged.

Dinner time: The group gathered for dinner before Rinna arrived

Bag of pills: Dorit Kemsley told the others about Rinna's bag of pills and how she puts Xanax in her smoothies

New office: Mauricio was opening a new office for his expanding real estate company in Mexico

Hungry gal: Erika Girardi was looking forward to burritos on the way to Mexico and was the first to ask about the dinner menu

She also threw Eden under the bus for taking anxiety medication.

During their downtime glamorous Erika Girardi was the fastest on the jet ski.

'There's only one way to ride a jet ski, open it up!,' she squealed before falling off.

Jet skis: Kyle and Dorit rode on a jet ski together while Erika went solo

Slower pace: Dorit complained that Kyle was going fast enough

Speed demon: Erika opened it up and gained as much speed as she could

Star overboard: Speed demon Erika fell of her jet ski and into the water

She's fine: Erika said that she was 'of course' fine and swam back to her jet ski

Meanwhile, Rinna's 18-year-old daughter Delilah had a fashion shoot.

'She knows how to work it now too, doesn't she,' said Rinna, who was about to watch Delilah in her first fashion show in NYC.

'I'm in a show with Gigi [Hadid],' said Delilah proudly.

Mother and daughter: Rinna meanwhile was in New York City as her daughter Delilah prepared to walk in a runway show

Family meal: Dorit Kemsley held her daughter Phoenix during a family lunch outing

Cute son: PK sat next to their son Jagger who has been attending speech therapy

'I'm really excited to meet her but I'm just hoping there's no weird vibes, because of that little feud,' she fretted, referring to the argument her mother had with Gigi's mother Yolanda Hadid.

Rinna had insinuated that Yolanda had faked her Lyme disease, causing much upset.

'My mom has more drama than I do,' said Delilah, begging Rinna to 'be civil' to Yolanda when they met.

Therapy session: Eileen Davidson was seen during a therapy session with her therapist Kelly as she continued to cope with the recent death of her mother

Work in progress: The soap star admitted she was a work in progress

Major show: Delilah was excited to be in the Tommy Hilfiger show with Gigi Hadid

Rinna tried to offer advice for the catwalk, but it was rejected.

'That's a little too much,' frowned Delilah as her mother strutted around.

Rinna then met with Camille Grammer, whose daughter was also in a fashion show.

Practice makes perfect: Rinna practiced walking in the hallway with Delilah

Proud mothers: Camille Grammer and Rinna talked about their daughters modeling

Camille said that after 'six, seven years' her ex husband Kelsey Grammer still would not talk to her.

'Kelsey refuses to speak to me,' she said.

'I would like to co-parent…and for him to communicate,' she said.

The Real Housewives Of Beverly Hills continues next week on Bravo. 

Single mom: The former RHOBH main cast member said she does not speak to ex-husband Kelsey Grammer