The Take That star and Ayda Field are being sued by their former personal assistant Gilles De Bonfilhs over claims Field "engaged in unwanted and unwelcome sexual conduct and behaviour" towards the ex-employee.
In a lawsuit filed at the Los Angeles Superior Court, De Bonfilhs claims Field exposed her naked body, asked him intimate questions about his sex life and discussed her own "sexual activity" while he worked for the couple between October 2014 and January 2015.
He is suing Williams and Loose Women panellist Field for sexual harassment, discrimination, breach of employment contract and fraud.
The case was heard briefly before judge Deirdre Hill on Thursday, where a motion has been filed to "compel deposition" from the celebrity couple.
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The judge will make a ruling on the motion on December 9, ahead of a planned trial set for February 16.
Williams and Field, who were not in court for the hearing, have branded De Bonfilhs's claims "despicable lies" and have filed a counter complaint for fraud and false invasion of privacy.
The couple married in August 2010 and have two children together - daughter Theodora Rose, four, and two-year-old son Charlton Valentine.
