'Hollyoaks' actress Stephanie Waring told The Sun on Sunday that she was left devastated after her friend Kym was spotted getting cosy with her ex-boyfriend just months after they split, saying she had broken an 'unwritten rule'.
Kym Marsh and Stephanie Waring
She told the paper: "She's carried on with him knowing what it's done to me. It is killing me.
"I considered her a friend who I've known for years. I had no idea that she would ever do anything like this... There is an unwritten rule that if you are friends with somebody you don't go near their ex partners."
But Kym appeared to hit back at Stephanie on Twitter on Sunday, tweeting: "Never fails to surprise me what some people do for money. Stopped reading crap ages ago. Gonna have a fab day with the fam #riseaboveit."
Just hours later she followed up her original tweet simply by posting the hashtag '#bitter'.
Kym and personal trainer Dan were spotted together last week in Manchester after Kym had judged the Miss Manchester beauty pageant.
Dan shared this snap of him kissing Kym on Twitter
And despite denying there was anything going on between her and the 31-year-old, it didn't look that way in a snap of them sharing a kiss that he later tweeted.
A spokesman for Kym told The Mirror: “Kym is very upset that Stephanie feels the way she does and has chosen to sell her story to a newspaper rather than speak to her directly.
"Kym and Dan are not in a relationship but have both been single for some time and are entitled to socialise with whomever they wish. Kym has more dignity than to respond further."