Despite admitting on the show that she didn't want to give the cagefighter any airtime, mother-of-five Katie spoke about their marriage and her discovery that he enjoyed cross dressing during a segment on Eddie Redmayne's new movie The Danish Girl.
Katie, 37, said she felt as though she had been in a "similar situation" to the characters in the movie, which tells the true story of an artist who becomes one of the world's first-ever recipients of a sex change operation.
The Loose Women panellists did point out that cross dressing and transgender, as detailed in The Danish Girl, are two different things, which Katie agreed with.
Several viewers also pointed this out on Twitter.
Katie said: "I can't wait to watch the film. Every individual is different in how they do things. Obviously one of my husbands liked to dress as a woman."
Katie didn't initially name Alex, but the other Loose Women panellists did, to avoid viewer confusion over which husband she was talking about. "I didn't want to give him airtime," she countered.
"I didn't see the signs in the beginning," said Katie, saying friends of Alex would ask her if she'd met "so and so" and she wouldn't know who they were talking about at first.
"One night we had a drink and I said, 'Should we try to do some makeup?' just mucking about. And I opened a can of worms. A can of worms I wished I never opened."
So far Alex Reid - who has been open about his Roxanne alter ego - has yet to comment.
Plenty of viewers, however, took to Twitter to say Katie needed to stop talking about CBB winner Alex, whom she divorced in 2011 after one year of marriage.
@loosewomen wrong panelist in Katie Price - once again slagging Alex ..yet you all encouraged the conversation.. Give him a break.— sam clancy (@mamfe71) January 5, 2016
Omg Katie Price going in on Alex poor guy— Stefan Gumbs (@stefangumbs) January 5, 2016
It's Katie Price's first show, and she's already talking about Alex Reid. #LooseWomen— Alfie Sheldon (@AlfieS12) January 5, 2016
Others, however, praised Katie's addition to the Loose Women panel: