The council said the parents had "effectively concealed" their treatment of the girls from "a wide range of workers in education, social services and health".
An internal review had shown that the foster carers were recruited, assessed and approved using a nationally recommended framework, including police checks and references.
The council also refuted claims in newspapers that the foster parents, both lesbians, had been recruited as part of a pilot scheme to attract gay couples and single parents into fostering.
"If there was a pilot scheme it's news to us," said a spokesman.
The couple, Lesley Broughton and Lynne Sheridan, were both handed community punishment orders.
Register Now to Continue Reading
Thank you for visiting Children & Young People Now and making use of our archive of more than 60,000 expert features, topics hubs, case studies and policy updates. Why not register today and enjoy the following great benefits:
What's Included
-
Free access to 4 subscriber-only articles per month
-
Email newsletter providing advice and guidance across the sector
Already have an account? Sign in here
