Police say 47-year-old Jeanne Quigley took money, silver and jewelry from a couple in Scarsdale.
The couple became suspicious, so they installed secret surveillance cameras in their home.
Quigley, of New Rochelle, worked for the couple for more than a year, caring for their young child.
She is charged with grand larceny and criminal possession of stolen property, both felonies.
Quigley is being held on $50,000 bail. She reportedly has a previous conviction in 2004 for stealing from another family.
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