After the events of The Real Housewives of Beverly Hills season 12, Lisa Rinna may be feuding with Kathy Hilton, but it's not her first time arguing with another cast mate. In fact, Lisa has been tangling with costars since she joined the series in season 5. Her strong personality and unfiltered opinions have been a constant presence on RHOBH for years, and because Lisa is not afraid to say what's on her mind, she's often involved in conflicts with varying drama levels. Since her mother Lois Rinna passed away in November 2021, her quick temper and emotional outbursts have become more prevalent. From starting fights online, to claiming in the finale that she would, "get sick and die" if she didn't talk about Kathy, Lisa has consistently blamed her onscreen and off-camera actions on Lois' death. She's been doing this since RHOBH season 12 premiered in May.

While Lisa's Fox Force Five friends (Kyle Richards, Erika Girardi, Dorit Kemsley, and former housewife, Teddi Mellencamp) have excused Lisa's behavior throughout RHOBH season 12, Garcelle Beauvais, Sutton Stracke, Crystal Kung Minkoff, and Kathy haven't been as forgiving. In fact, the RHOBH season 12 trailer showed Kathy telling Lisa that she was, "the biggest bully in Hollywood," who, "fights with everyone," and drove OG housewife Lisa Vanderpump off the show. While Kathy's comments shocked her co-stars (and surprised viewers at home), they may not be completely inaccurate. Now, it's time to look at Lisa's biggest feuds with former RHOBH housewives over the years, and what happened afterwards.

Related: Why RHOBH Fans Are Slamming Lisa Rinna's LeBron James Comparison

Lisa Rinna & Kim Richards (RHOBH Season 5)

Split image of Lisa Rinna and Kim Richards fighting on RHOBH

Kim Richards' sobriety was a hot topic on early seasons of RHOBH, after Kyle outed her sister as an alcoholic during the RHOBH season 1 finale. By the time RHOBH season 5 came around, Kim claimed to be three years' sober, although first-time housewife Lisa and Brandi Glanville questioned her sobriety. Despite Kim making it clear that she did not appreciate Lisa's concern or questions, Lisa continued to press the issue, while the group traveled to Amsterdam. Lisa once again brought up Kim's sobriety at dinner (in the form of an apology), but Kim immediately became defensive. At the end of the infamous Amsterdam dinner, Kim brought up Lisa's husband Harry Hamlin, Lisa smashed a wine glass in response, and Kyle dramatically ran out of the restaurant. RHOBH season 5 was Kim's last appearance as a full-time housewife, although she continued to make appearances through season 10.

Lisa Rinna & Yolanda Hadid (RHOBH Season 6)

Yolanda Hadid and Lisa Rinna on RHOBH season 6 at restaurant

Lisa and Yolanda Hadid were cordial throughout RHOBH season 5, despite Lisa's problems with Kim, but that changed when Yolanda's battle with Lyme disease became a major storyline. Lisa, who previously complained that Yolanda looked healthy on Instagram, despite being sick in person, suggested to Kyle and LVP that Yolanda did not have Lyme, but Munchausen syndrome. This is a condition whereby a person feigns an illness. Word quickly spread among the housewives, and although Lisa tried to backtrack and blame Kyle and LVP for bringing up the alternate diagnosis, the damage was already done. By the end of RHOBH season 6, Yolanda had made it clear that she did not trust Lisa or her other co-stars, and quit the series after the reunion.

Lisa Rinna & Eden Sassoon (RHOBH Season 7)

Lisa Rinna and Eden Sassoon talking outside in RHOBH

Eden Sassoon was a one-season wonder who appeared as a friend during RHOBH season 7. Despite Lisa and Kim's previous blowout over Kim's sobriety, Lisa told Eden on the show that Kim was "close to death," and that Kyle was an "enabler," who was afraid of Kim dying. Eden told LVP what Lisa said, and just like all other gossip did, Lisa's accusations made their way back to RHOBH stars Kim and Kyle. Instead of owning up to her comments, Lisa feigned memory loss, blamed Eden for the situation, and eventually stormed off in tears. Eden and Lisa confronted each other several times, but their friendship never recovered after RHOBH season 7.

Lisa Rinna & Lisa Vanderpump (RHOBH Season 9)

Lisa Rinna Lisa Vanderpump RHOBH side by side image

Lisa and LVP shared an up-and-down relationship following the events of RHOBH season 6, but it wasn't until RHOBH season 9 that things between them reached their peak. Before filming for RHOBH season 9 began, two major things happened: LVP's brother Mark Vanderpump passed away, and Dorit Kemsley adopted a dog, Lucy, from LVP's foundation, Vanderpump Dogs. News traveled that Dorit gave Lucy away, instead of bringing her back to LVP's shelter, but the real drama began when Lisa V.'s employee John Blizzard, Teddi Mellencamp, and Lisa accused LVP of leaking "Puppygate" to Radar Online. Kyle sided with Lisa and Teddi, which dramatically ended her once-close friendship with LVP. RHOBH fans were devastated when the conflict caused fan favorite LVP to skip the season 9 reunion, and quit.

Related: Why Lisa Vanderpump Is The Shakeup RHOBH Season 13 Needs

Lisa Rinna & Denise Richards (RHOBH Season 10)

RHOBH Lisa Rinna Denise Richards side by side image

Before their relationship was severed on RHOBH season 10, Lisa and Denise Richards were friends for over 20 years. Denise, who had recently married Aaron Phypers, was reluctant to discuss certain topics on-camera, and would say, "Bravo, Bravo, Bravo," to break the fourth wall i.e. halt filming. As RHOBH season 10 continued, it was alleged that Denise and former housewife Brandi had previously hooked up. While Denise vehemently denied the rumor, and hoped that Lisa would stick up for her, Lisa took Brandi's side. Lisa was infuriated that Denise sent her and the other RHOBH stars cease and desist letters due to the situation. After going head-to-head throughout the RHOBH season 10 reunion, Denise quit the show. Lisa later apologized to Denise, but Denise has made it clear that their friendship is over.

Lisa Rinna & Kathy Hilton (RHOBH Season 12)

Lisa Rinna & Kathy Hilton on The Real Housewives Beverly Hills side by side images

The current feud between Lisa and the third Richards sister, Kathy, came to light months before RHOBH season 12 began to air. Shortly after the housewives filmed in Aspen, Colorado this past January, reports surfaced that Kathy had an alleged meltdown towards Kyle on the trip, which shook Lisa. Lisa and Kathy have traded passive-aggressive social media blows ever since, but when the Aspen trip was finally televised, RHOBH fans were shocked that no footage of Kathy's tantrum existed. Although Kathy apologized to Kyle and Lisa on-camera, Lisa and Erika Girardi continued to rehash the situation. The last few minutes of RHOBH season 12 showed Kyle accusing Erika of leaking information about Kathy to the press through her publicist, and although many former housewives have quit after their conflicts on RHOBH, Kathy has no plans to back down when it comes to Lisa.

Next: Why Kathy Hilton May Not Return For RHOBH Season 13 (& Why She Will)

The Real Housewives of Beverly Hills airs Wednesdays at 8 p.m. EDT on Bravo.