Peter Andre 's children questioned him about the comment Rebekah Vardy made about his manhood after the story resurfaced last week.
The Mysterious Girl shares Amelia, eight, and Theo, five, with wife Emily, and Junior, 16, and Princess, 14, with ex-wife Katie Price.
According to a source, his children have now heard about the story and he is "furious" about the situation.
Rebekah is currently in a libel trial with Coleen Rooney and, during the first day of the high-profile case last week, Peter's manhood was mentioned.
In the proceedings at London’s High Court, Rebekah took to the stand to admit she regretted describing his pecker as a “miniature chipolata” in a 2004 kiss-and-tell newspaper interview with the News of the World.
Since then, Peter has been hitting headlines and going viral for the old interview and he OK! magazine on his social media.
The source told OK! magazine : "Pete is livid. This whole thing has been really hard on him and the family, but it’s made him think about the wider story and that is that other people shouldn’t be allowed to talk about others in this way.
“It’s so discriminating to say this about a man, this would not be said about a woman. His children have been asking what the story is about, which is really difficult. He has no recollection of meeting this person, never mind anything else."
The source also insists Peter didn't know his name would be mentioned in the Vardy and Rooney court case.
Mirror have contacted his representatives for comment.
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Rebekah previously claimed she sent "personal messages" to Peter and his wife Emily following the 2004 interview.
Giving evidence last week, Jamie Vardy's wife claimed some of the quotes in the article were not her own words, and she "deeply regrets" it.
She told the court: "There’s a lot of things in there that didn’t come out of my mouth and misrepresented and circumstances around that article I’m deeply sorry for.
"I was very young. I haven’t spoken to him but I sent both his wife and him personal messages a couple of years ago."
She also said she was "forced" to do the interview by her ex-husband.
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