The victims' older brother came forward later with letters written by the girls' mother to their father that said the girls were having sex with Kaplan, as was the mother.
They will return to the Bucks County Justice Center at 9 a.m. Tuesday to continue weighing the evidence against Kaplan heard over three days of testimony, Bucks County President Judge Jeffrey L. Finley ordered.
District Attorney Kate Kohler said the girls were telling the truth when they recounted disturbing details about their relationships with Kaplan, who consigned them to a world in which "sex with children was ordained by God".
The girls were the daughters of a Lancaster County couple who had broken away from the Amish community, investigators later said. He said the girls had been "mishandled and mistreated" by authorities and prosecutors trying to get them to take the stand.
In closing arguments Monday, Kaplan's attorney, Ryan Hyde, told jurors lied in their testimony last week in Bucks County Court about their accounts of sexual abuse.
Hyde argued Monday morning that the alleged victims' parents targeted his client for his money after taking advantage of his generosity.
The parents allegedly promised one of their daughters to Kaplan in marriage when she was just 7.
In April, Savilla pleaded guilty to one count of endangering the welfare of children, a felony of the third degree. She said she believed that's what husbands and wives do.
Savilla and Daniel Stoltzfus were also arrested for child endangerment.
Kaplan was rarely seen out and about with the girls or with the Stoltzfuses, according to neighbors. He claims he didn't abuse her sisters. "I just knew. There was no reason why this older, significantly older man, any man, regardless of what they look like, would have this amount of children, all in blue dresses, never outside the house regularly, looking so scared", she said.
Hyde said the younger girls initially denied any sexual activity with Kaplan but changed their stories after a meeting with their mother in October.
A self-styled cult leader has been convicted of raping six sisters aged between eight and 18 years old over several years, and even fathering two children by one of them.