She will appear tomorrow at the Wimbledon Magistrates, London Metropolitan Police reported.
The children were reportedly suffering from Spinal Muscular Atrophy, a life limiting debilitating disease.
On Tuesday London Metropolitan police said in statement officers were called to a home in Thetford Road, New Malden.
When the officers arrived, accompanied by an ambulance service, the three children were found dead at the scene.
It will be a further blow for husband Gary and father to the three children who returned to England after visiting Cape Town with his sole remaining eight-year-old daughter, Taya Grace.