The rugby star, 35, dated the model, 43, between August 2008 and June 2010.
In his new autobiography, Danny reveals how their stormy relationship unravelled spectacularly for the first time when they went on holiday to Las Vegas in the summer of 2010 – and Kelly encouraged him to enjoy a lapdance in a strip club.
He admits: “It all started because I was very p*ssed. I was having a dance and it felt like she was doing a bit more than a dance.
“I started chatting some cheesy lyrics to her.”
Danny told the stripper he was breaking up with Kelly and would be back in the American gambling city the following week – which she relayed to pals in the toilets, all in front of his horrified girlfriend.