Finley said the actions of Daniel and Savilla Stoltzfus were unimaginable as he sentenced them following their convictions on child endangerment charges.
They pleaded guilty back in April.
No sentencing date has been set for Kaplan.
Savilla Stoltzfus, 43, who testified at Kaplan's trial, pleaded guilty to the charge.
Pictured Lancaster, Pennsylvania Amish couple, Savilla Stoltzfus and Daniel Stoltzfus.
Defense attorney Ryan Hyde said Kaplan was married to the oldest daughter in the family's eyes and the other children loved him.
Prior to their sentencing, one of the couple's daughters asked the judge to consider the childrens' love for their parents.
The parents consigned their daughters to what some "might call a life of sex slaves". "For whatever sick goal, whether or not you fell under the power, in a trancelike state, of Kaplan, you knowingly allowed your family, your children, your daughters to move into this person's home". "I regret having to put my children through what they've been through this past year and wish to reunite with my children", he told the court Wednesday.More news: SIG plc (LON:SHI) Given Consensus Recommendation of "Hold" by Analysts
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Savilla told the judge that she felt 'very very lost' when they met Kaplan. The girls' mother testified she knew about the sexual activity between the man and her daughters but believed "it could be a good thing".
Kaplan was rarely seen out and about with the girls or with the Stoltzfuses, according to neighbors. Testifying at Kaplan's trial, Savilla Stoltzfus said that she and her family viewed Kaplan as a prophet.
"The struggle I'm having is she got no benefit for handing the government Lee Kaplan on a silver platter", Penglase said.
According to The Philadelphia Inquirer, Mr and Mrs Stoltzfus were sentenced to up to seven years in prison on child-endangerment counts.
Six of the daughters, now 9 to 19, later testified in court that their sexual contact with Kaplan began between the ages of 7 and 11 for each of them.
Neighbors described Daniel and Savilla Stoltzfus as caring and hard-working until a 14-month-old son was killed in a farm accident in 2001. He advised them to turn away from the Amish lifestyle and supported them financially, prosecutors say.
The break led to financial problems when an Amish bank revoked the family's $300,000 business loan, they said.
"It would be higher if I had the ability to do so", Finley said to both parents of his sentences for them. They will have to complete therapy in order to be reunited with their children.