The 34-year-old model - who was married to the cage-fighter for a year until early 2011 - has been talking with the blonde reality TV star following revelations Alex is a cross-dresser who set up a sex dungeon in their home.
Speaking at the launch of her jewellery collection last night (07.11.12), she said: ''I've actually been in contact with her behind closed doors and we're discussing our own little things.''
Katie - who recently split from Argentinean model Leandro Penna - also reveals she has seen pictures of the supposed ''dungeon'' previously.
She added: ''I've seen the videos and pictures yeah. I've seen more than you can imagine.''
She plans to reveal details of the relationship she had with him herself when she releases a tell-all book next year.
Katie told the Daily Mirror newspaper: ''Like I say it goes back to the Gareth Gates days, everyone was saying, 'Oh she wishes she was seeing him' and then it was true. I said things about Alex, not into detail, but it was true.
''You always know I don't lie. I know the truth. Lucky I'm doing my book next year because boy, there's a lot going in that one!''