The former couple - who have kids Princess and Junior – split in May 2009 after three-and-a-half-years of marriage. According to Now magazine, Katie has started to have a change of heart.
“Katie’s been messaging him a lot,” said a source.
“She was going on about how great they used to be together. She told him that they could be really good if they got back together again.
“I don’t know how serious she is. Pete’s a bit embarrassed, so he’s just trying to steer the conversation towards the kids and laugh it off.
“He also says some of the texts have been quite raunchy and he’s been a bit taken aback.’
A spokesman for Peter said, ‘They have been speaking and are trying to be on good terms.”