She dropped the bomb back in May that her husband of over a year Kieran Hayler, 27, had been having an affair with married friend Jane Pountney, 50, for seven months.
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Now the pregnant former glamour model, 36, has admitted that he was also sleeping with 41-year-old Chrissy Thomas, who Katie has been friends with since she was 18.
Katie claims that the affairs were calculated and that Kieran was ‘grooming’ her pals to get them into bed.
She told The Sun on Sunday: “He got their numbers from me or approached them on Twitter and began the process of getting them into bed.”
READ: KATIE PRICE SAYS SHE'LL NEVER FORGIVE KIERAN HAYLER OR 'SCUM' JANE POUNTNEY FOR THEIR AFFAIR
While Katie had suspicions that Jane wasn’t the only ‘other woman’, it wasn’t until Kieran was in therapy for sex addiction treatment that it came out about Chrissy.
She continued: “It came out in his therapy that he’d been having affairs with Chrissy and Jane at the same time. He usually s****d in a lay-by on the way home from his plastering job in Guildford, Surrey.
“He preferred to s**g Jane in a pub car park. The affairs were calculated and evil on his part but also on theirs.”
Katie, who is eight months pregnant with her and Kieran’s second child – her fifth – said that Kieran would spend time at the house with all three women.
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“They are the two people who I thought would have my back and Kieran has been in my house with all three of us, knowing he’s sleeping with all of us,” she added.
“Chrissy has told me that Kieran would tell her: ‘I’m so in love with Katie but we haven’t had sex in months. I’m so down and I need a hug.’”
She admitted that, despite the fact that Chrissy ‘had the balls’ to come clean about her affair with Kieran, unlike Jane, she has tried to shift some of the blame onto Katie.
She said: “She recently sent me a text message saying: ‘When are you seeing a counsellor because your head is f*****?’ That has offended me. Of course my head is messed up because two of my best friends have been f****** my husband.
“What I have experienced is the ultimate betrayal by the very people who I thought loved me at a time when I needed them most.”