The Steps singer was married to dancer Mark Webb at the time, she explained in her autobiography All of Me, currently being serialised in The Sun.
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She had been told that the former Another Level singer had a crush on her by her bandmate Lee Latchford-Evans, and spent the night together in a hotel room after a wedding.
"Years before he'd told Lee that he fancied me, but nothing came of it because he was dating Katie Price," she wrote.
"At the end of the night I got a cab back to the hotel with Dane, and we both said goodnight and went our separate ways.
"When I got back to my room I wasn't ready for the night to end, so I decided to knock on Dane's door and ask him if he could help me undo my dress! I fancied him a bit and I was up for a flirt.
"We chatted for ages then he started kissing me and we ended up having a bit of a fumble, although we didn't have sex. I woke up in his bed fully clothed the next morning and had to do the walk of shame."
She added: "I didn't want to leave his room wearing the same outfit I'd worn to the wedding because I knew that would look bad, so I wrapped a big towel around me, tucking my dress straps underneath to hide them, so it looked like I'd just popped into his room to borrow something.
"I gave Dane a lift back to London that day and as I dropped him off I said to him, 'I'm married; I can't do this'. 'I think that's a real shame,' he replied. 'We could have given it a go'."
She decided not to tell her husband about her night with Bowers, and their marriage eventually broke down.
"When I got home, Mark was there. I put what happened with Dane to the back of my mind and tried again to make our marriage work - but it still wasn't right."
Claire Richards has also spoken about her anorexia battle during her time with Steps.
