George's lawyer Nicolas Gerasimidis successfully applied at Bristol Crown Court on Friday for the trio's sentencing to be delayed to give time for more material to be gathered.
Last month, Mr Justice John Royce called on George, who worked at Little Ted's Day Care Unit in Plymouth, to co-operate with police in identifying all the abuse victims in the photographs.
Last week, it emerged George had finally revealed a list of children's names to Devon and Cornwall Police, the Press Association reported.
"If parents want to find out whether their child has been abused, then they should be in a position to do so," the judge Justice Royce said.
"If they don't want to know, and I fully understand why some parents should not want to know, then the information should not be thrust upon them. It should be a parental choice."
George, a married mother of two, admitted seven sexual assaults and six counts of distributing and making indecent pictures of children.
Blanchard, from Greater Manchester, pleaded guilty to 17 child pornography counts and two sexual assaults on children.
Allen, from Nottingham, pleaded guilty to four child sex assaults and one count of distributing an indecent image.
Gerasimidis told the court George intends to claim that Blanchard used her to access indecent images.
The abuse for which the three were convicted began in September 2008 and carried on until this June. Royce adjourned sentencing to the week beginning December 14.
(Reporting by Michael Holden; Editing by Steve Addison)
