"I was gobsmacked" she told the paper. "The council knew what he did to me and to other vulnerable girls. They knew he was behind bars and a risk to my son, who wanted nothing to do with him, but they bent over backwards to include him in the case. I felt angry and scared for my son."
A family court judge last year heard the child's case. The council was seeking a case order with the support of his mother, who was unable to cope with the troubled boy's complex needs and agreed that he would receive greater protection in a residential placement.
By law the local authority is obliged to contact all "respondents" when such an application is made.
Baroness Newlove, the victims' commissioner for England and Wales, described it as a "perverse situation" adding: "This appears to be a case in which a victim of the worst sexual violence faced the prospect of continuing to be abused by her perpetrator, this time via the family courts."
Louise Haigh, the shadow police and crime minister, said that the council's decision to offer the serial rapist a role in the proceedings was "appallingly insensitive"
The Ministry of Justice said it was investigating whether the incident was the result of a social worker's error or systemic failings.