Lisa Vanderpump's Brother Mark Committed Suicide, His Fiancee Claims

Just months after a feud tore the famous family apart, The Real Housewives of Beverly Hills star Lisa Vanderpump's brother Mark died of a suspected drug overdose on May 1 at just 59 years old.

And now, in an exclusive interview with RadarOnline.com, the British DJ's fiancée claimed he committed suicide!

"It was for sure suicide," the heartbroken Gemma Walker, 36, told RadarOnline.com. "I was the last person he spoke to."

The model told RadarOnline.com she received cryptic messages from her fiance the day before his death.

"He sent me a text message that said he was going to a better place," she said. "The last message he sent me was 'My fingers are getting slower.' I didn't understand it at first. I was calling him and texting him back, and I heard nothing."

U.K. officials told RadarOnline.com earlier this week that Mark was rushed to a local hospital before he passed away.

"Of course I am devastated. I loved him very much. I am with my family now," said Gemma, who became engaged to Mark after three years of dating.

As RadarOnline.com previously reported, Mark and Lisa had an explosive fight in a swanky New York restaurant earlier this year. At the time, sources told RadarOnline.com that he was planning to write an explosive tell-all book about their feud.

But the reality mogul, 57, claimed that the two siblings had reconciled since the fight.