Camille Cosby is scheduled to be deposed by lawyers representing the women in Massachusetts on Wednesday (06Jan16).

Making his ruling on Thursday (31Dec15), Judge David Hennessey said Camille failed to prove that she and her husband were protected by the state's marital disqualification law.

The couple has been married for more than 50 years, and Camille is also her husband's business partner.

A lawyer for the accusers, Joseph Cammarata, argued he should be able to question Camille Cosby, because he believed she had information relevant to "the litigation in this matter".

In a motion filed on 18 December (15), to quash the subpoena, Bill Cosby's lawyers insisted Camille has no information about the accuracy of the allegations against her husband.

The women claim Cosby allowed his representatives to portray them as liars after they went public with their allegations at the end of 2014 and the beginning of last year (15).

Cosby has filed a countersuit, accusing the women of making false allegations for financial gain.

He was officially charged with drugging and sexually assaulting a woman in 2004 at his home near Philadelphia last week (ends01Jan16). His lawyers have called the charges unjustified.