Jyl Moder, the sister of Roberts' cinematographer husband Danny, was detained in Palm Desert, California in the early hours of Monday morning (20Jul15) and taken to Indio Jail to be booked on a charge of wilful infliction of corporal injury on a spouse or cohabitant.

The circumstances of her arrest have not been confirmed.

According to Riverside County Sheriff's online records, Moder, 49, remains in jail after failing to post bail of $50,000 (£31,000).

She is scheduled to appear at the Indio Larson Justice Center on Wednesday (22Jul15).

Roberts has been married to DANNY MODER since 2002.