Simon Cowell could be called to court during divorce hearings for the New York socialite Lauren Silverman, who is reported to be having his baby, according to the US media.
Papers lodged at the New York Supreme Court show that her husband, Andrew, is the plaintiff in a case in which she is named as the defendant, but they remain sealed because it is a "matrimonial" case.
But the New York Post reported that Mr Silverman, a property magnate, had taken "the highly unusual step of embarrassing Cowell personally by naming him as a co-respondent in divorce papers".
It also reported he had filed for divorce based on his wife's adultery despite New York state allowing no-fault divorces, which means Cowell could be called to give evidence.
The X Factor boss has not commented on the story so far but his mother is reported to be "delighted" about the news that the music mogul is to become a father for the first time.
Julie Cowell told The Sun: "I'm delighted. It's wonderful!"
According to the newspaper, Cowell, 53, fell for 36-year-old Mrs Silverman after her marriage hit the rocks.
Meanwhile, Mail Online has published photographs of Cowell and Mrs Silverman on a Caribbean holiday in January last year.
Mr Silverman was also on the holiday and the trio are pictured relaxing on a luxury yacht.