Pauline Potter entered the Guinness Book of World Records last year as the world's heaviest woman - weighing a massive 52st. But now she's been shedding the pounds at a rate of knots, thanks to marathon sex sessions with her ex-husband.

As The Huffington Post reports, 47 year-old Potter reignited her love affair with her 10st ex, Alex, last July and now the couple make love up to seven times a day. As a result, she's lost 7st in seven months.

“I can’t move much in bed, but I burn 500 calories a session - it’s great exercise just jiggling around,” she tells Closer magazine.

“My bed is strengthened and, although I can’t buy sexy lingerie, I drape a nice sheet over me.”

Potter says she began binge eating after she divorced Alex four years ago. Her weight ballooned to 45st, she couldn’t leave the house without a motorised scooter and eventually, she stopped walking altogether.

She contacted the Guinness Book of World Records last July in an attempt to shame herself into losing weight. The publicity led Alex to get in touch - and their romance was immediately rekindled.

“She can’t walk, dress herself or even go to the toilet on her own - but I’m desperate to be her lover and caretaker again," he told The Sun last year. “Pauline could be 70st and we’d still have sex every single day because it’s that good.

“It was the biggest mistake of my life letting Pauline go and it’s taken her gaining weight and becoming the world’s heaviest woman to realise how much I still love her.”

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