From News of the World:
Their whirlwind romance collapsed just a week ago and Britney, 25, has already found a new admirer.
But Isaac, also 25, said: “She loves sex and is incredibly adventurous. She was totally happy when we were locked in each other’s arms. But once the sex stopped Britney was like a little girl lost, unable to cope.
“She would lie like a limp rag doll in my arms and and say, ‘Why can’t everyone leave me alone?’ and, ‘What have I done to deserve this?’”
Britney, who was first married to childhood friend Jason Alexander for 55 hours before it was annulled, lasted a full two years with Kevin.
They have sons Sean Preston, one, and four-month-old Jayden James, but Britney grew tired of hearing rumours about Kevin’s womanising.
In the weeks leading up to her first date with Isaac last December, Britney was branded a bad mum when she was photographed night after night partying until the early hours with new best friend Paris Hilton, 25.
And her family was horrified when she was photographed three times stepping out of cars knickerless.
Isaac said: “By the time I met Britney she was burnt out. She knew she had been drinking and partying as a way to try to banish the bad stuff from her life. Far from the trashy drunk, I saw a very shy, sweet girl who was just desperately sad about what had happened with her marriage.
“Yes she enjoyed Jack Daniel’s but she was trying not to get in the state she had been in with Paris. Her boys mean everything to her and she worried she might lose them in a custody battle.
“It was clear she was not over her marriage. The first time she invited me to her home I saw her wedding dress hung on the wall in a glass box.
“As we made love that night it was like Kevin was in bed beside us. She had not even begun to move on with her life.”
And so when Britney decided to clean up her act at an Arizona health spa, Isaac went along too.
He said: “She needed me to hold her and tell her what a beautiful girl she is. We would make slow love until the sun came up.
“She has an amazing body and I loved exploring every inch of it.”
Wow, it’s SOOOOO not over. Isaac Cohen spills MORE DIRTY DETAILS after the jump!
In January Britney surprised him by flying them to Las Vegas to stay at Hugh Hefner’s exclusive Sky Villa in the Palms Hotel.
At a whacking £20,000 a night the two-storey suite has a rotating bed, with mirrored ceiling and an infinity Jacuzzi spa bath on the rooftop.
Isaac said: “Britney is not shy about her body so she slowly stripped off her clothes and beckoned me to join her under the stars in the pool.
“It was an amazing view over the Las Vegas strip. But we didn’t stay long as we wanted to try out the bed.
“So we clambered on and I grabbed the remote and started it turning round and round. All the time as we made love we watched ourselves in the mirrored ceiling.
“It was amazing but we did it so many times it made us start to feel sick. We had to turn it off.”
Britney was also racked with insecurities about her appearance, said Isaac. “Like any woman who has had two children she worried about her figure.
“As far as I was concerned she was gorgeous, but she had such low self esteem she sometimes would not listen.
“She would say, ‘Am I fat? Am I fat?’ then spend hours dancing around the house trying to burn off calories.
“She was always jumping around.
“Other times, she got so low she didn’t care what she looked like. She could not care less some days if she went out of the house without brushing her hair or checking to see if her outfit matched.
“That’s just where she was in her life. She had so much on her plate with the children she had precious little time to worry about how she looked.
“It was around that time her aunt died and that totally devastated her. It was yet another blow.
“It was me she turned to for comfort and me who travelled to Louisiana for the funeral.
“I rarely saw Britney with any friends and during our time together I never saw her with Paris, it was like that was a part of her life she wanted to forget.”
But it soon became clear that Isaac could not cope with the demands of Britney’s troubled and hectic life.
And so last week, in an emotional phone call, the couple put an end to their six-week romance.
“I adore Britney and in a different place at a different time we might have stood a chance,” said Isaac. “It was far too soon for her to get involved in a relationship with anyone.
“But she has coped with so much in her life I hope she does not give up now. She is too special for that.”