It comes after the elderly man was found dead at their home in the Surry Hills area of the city.

Police were called to the couple's apartment complex by neighbours who had expressed concern for the pair's welfare.

Officers then found the body of the pensioner in the lounge.

He had suffered head injuries, according to police.

The victim's wife was arrested at the scene and then taken to Surry Hills police station.

She was questioned, through an interpreter, and was later charged with murder.

The suspect has appeared via video link at Parramatta Local Court.

She is next due to appear at Central Local Court on Monday.

A post-mortem is due to be carried out on the man's body to formally establish the cause of death.