Olivia Evans, 22, of Hollywood, Fla., was handed a sentence of one year and three months in federal prison and ordered to pay restitution of more than $402,700, the South Florida Sun-Sentinel reported.
Evans' two sisters are already serving prison terms along with their mother.
Her sentencing was delayed so she could give birth to her second child.
She pleaded guilty in September to federal charges of mail and wire fraud.
Evans' attorney, Richard Merlino, asked for leniency, saying she was adopted into the Romany gypsy culture and did not choose that way of life.
"At the age of 5, she was taught by her adoptive mother the art of psychic mysticism," Merlino told the court.