Prosecutors say Murielle Misczak used the money to fund a lavish lifestyle, including extravagant travel, shopping, and even professional wrestling tickets.
Julie DeVuono, the 50-year-old pediatric nurse practitioner from Amityville, was charged with forgery, money laundering and conspiracy.
The 84-year-old said she's embarrassed and devastated after losing her life savings.
What sound like throwback arrests Tuesday in New York and New Jersey show "the underbelly of the crime families in New York City is alive and well," the FBI said.
One of the stars of "The Real Housewives of Salt Lake City" is under arrest, along with her assistant, accused of running a nationwide telemarketing fraud scheme.
The Justice Department lists some of the purchases as nearly $725,000 for homes in Texas, $78,000 for a 2020 Land Rover and a $63,000 purchase at Chanel.