Myleene Klass has made one of the most explosive claims of her career — alleging she caught her Irish ex-husband Graham Quinn cheating with another well-known woman inside her own home, during her own birthday celebration.
Speaking with raw honesty, Myleene described a moment she says shattered her marriage and rewrote the course of her life — a discovery made while guests were still celebrating downstairs.
‘I Walked In on Them on the Balcony’
Appearing on We Need To Talk, the Loose Women star recalled the night in chilling detail.
“I walked in on him with a famous person — on my birthday — on a balcony,” she said.
“I’m in my house. It’s my party.”
While she stressed the pair were not having sex at that exact moment, she said what she saw left no room for doubt.
“They weren’t having sex,” she explained. “But they were unzipping each other.”
According to Myleene, both her then-partner and the unnamed female celebrity attempted to dismiss what she had witnessed.
“They tried to say it wasn’t what it looked like,” she said. “But I was like, ‘It is what I think.’”
The Woman She Refuses to Name
Despite years of speculation, Myleene has consistently refused to publicly identify the other woman — revealing only that the celebrity later built a highly visible “family brand.”
“For a long time, it was very difficult to see their life,” she admitted.
“My life literally just broke apart very, very publicly. And their life carried on.”
“This is the person I caught him with,” she added quietly.
‘Everyone Had to Leave’
Myleene said she immediately shut down the party, asking all guests to leave — including Quinn’s parents.
One remark from her father-in-law, she says, has stayed with her ever since.
“I remember thinking that was quite a weird thing to say.”
Even then, she admitted she recognised the incident as a major warning sign — yet still went ahead with their wedding months later.
‘I Was Sobbing in the Bath the Night Before Our Wedding’
The former Hear’Say singer has previously revealed that the night before marrying Quinn in October 2011, she was overcome with dread.
“I was sobbing in the bath,” she said.
“I knew it wasn’t right.”
The couple eventually split in 2013 after 12 years together — a breakup that played out painfully in the public eye.
The Hidden Fallout: Alcohol, Anxiety, and Survival
Years later, Myleene admitted the divorce pushed her to the brink. In 2019, she revealed she had developed a dependence on alcohol during the aftermath.
“I remember thinking it was okay to have a drink at 11am,” she said.
“Because I hadn’t had one in five hours.”
She also spoke about crippling anxiety, financial fear, and moments where she physically couldn’t leave her car.
“I opened the door and I couldn’t get out,” she recalled. “I couldn’t breathe.”
Finding Her Voice — and Peace
Now engaged to Simon Motson, Myleene says she has finally found stability and happiness. The couple share a son, Apollo, born in 2019.
Earlier this year, she was awarded an MBE for her services to women’s health, miscarriage awareness, and charity — a moment she described as reclaiming her voice after years of silence.
Yet the memory of that birthday night remains etched into her story.
“You’re messing with people’s emotions and their lives,” she said.
“The repercussions are permanent.”
