Renee Nolan sat quietly in the dock in Melbourne Magistrates Court on Tuesday, as she faced court charged with murdering Harry Nolan, 73.

Mr Nolan's body was found in his bed in his Mitcham unit on Monday afternoon.

An out-of-sessions hearing on Monday night was told Ms Nolan rang triple-0 to inform police of her ex-husband's death.

Ms Nolan later admitted to police to causing the death, Detective Senior Constable Matthew Lewis told the out-of-sessions hearing.

On Tuesday, the court heard Ms Nolan had never been in custody before and needed to see a psychiatric nurse.

Prosecutor Adrian Trott said investigators would likely face a three-month wait before they received a forensics report, while a pathology report was 15 weeks away.

Ms Nolan is due to return to court on February 28.