Reese Witherspoon’s mother was in a Nashville court Friday to argue that her husband — and the actress’ dad — married another woman while the two were still hitched.

Witherspoon joined her mother Betty in court for an emergency hearing before a probate judge, according to a Tennessee newspaper. Betty Witherspoon is claiming that her husband John committed bigamy by marrying Patricia Taylor in Gatlinburg, Tenn. in January, so she wants the marriage annuled. Meanwhile, the actress and her brother are asking the judge to place their father under conservatorship.

Court documents say that Betty Witherspoon is concerned that her husband of 42 years is suffering from dementia. Friday’s hearing was closed to the public.