Speaking to fellow housemate Cami Li, she detailed how she caught him in bed with another woman after being tipped off by a mutual friend.
‘He head f_ed me completely. He really f_ed me up. I’ve had my fair share of bad guys, believe me,’ said the star.
Katie went onto say that the incident was so traumatic she had to seek therapy to recover from it.
Price recalled the moment that she caught her boyfriend in the act, saying: ‘I could hear him having sex in the upstairs bedroom. So a group of us tiptoed up.’
‘We all crept into the bedroom and were standing there lined up in a row just looking at the bed.’
‘I just stood there and said “Hiya! I just want to let you know that I forgive you but I’ll never forget what you’ve done.”’
‘Then I turned to the girl and said “As for you, if you were thinking about sucking his ck, you should know that he was licking my p*y this morning so you’re just going to be tasting me.’
Katie did not confirm which particular lover she was speaking of during the story; with everyone already well aware of what happened between her and current husband Kieran.
In May, Katie discovered that Kieran had been sleeping with her best friend, Jane Pountney, for over a year - including when she was pregnant.
The 36-year-old has also had high profile relationships with Peter Andre, Dane Bowers, Alex Reid, Danny Cipriani, Leandro Penna and Dwight York.