St. Lawrence County Sherriff's Sgt. Brooks Bigwarfe says Nicole Vaisey admitted she and boyfriend Stephen Howells Jr. got the girls to their car with an offer to pet the dog and he shoved the 7-year-old and 12-year-old sisters in.
Bigwarfe says she told him they shackled the girls and intended to turn them into slaves. He says they released the girls about 24 hours later, frightened by news reports.
Fowler Justice Paul Lamson ruled Thursday there's reasonable cause to believe Vaisey committed felony kidnapping. He ordered her held without bail.
District Attorney Mary Rain says the children were sexually abused by the "sexual predators."
Defense attorney Bradford Riendeau says Vaisey was Howells' slave.
Howells waived his right to a hearing.