A mother has faced court accused of the murder of her seven-month-old son in what police allege is a domestic violence homicide.

Police and paramedics were called to the residence about 3am following reports of a serious assault.

The lifeless infant was found with critical injuries and declared dead at the scene.

It is believed the boy suffered stab wounds and Sells was drug-affected.

He is understood to have died in front of family members, including a 13-year-old girl.

A slender woman with long, dark hair and a thin face, Sells remained still in the dock, her head lowered and accompanied by two security guards, during the short hearing.

She stood when the charge against her was read, acknowledging she understood the accusation before being led from the court.

WA Police Commissioner Col Blanch previously described the incident as “horrific” and a “very sad story”.

Sells was remanded in custody to reappear in Stirling Garden Magistrates Court on August 20.

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