The mother of two brothers, from Birmingham, accused of raping their six-year-old sister has told jurors how she called in social services after the girl claimed to have been abused.
The woman, who cannot be named to protect the identity of her children, told Birmingham Crown Court she alerted the authorities because she believed her daughter's allegations.
Giving evidence from behind a screen on the fourth day of her sons' trial, the mother could only be seen by the judge, jurors, court clerk and the barristers involved in the case
Her sons, who are aged 13 and 15, deny charges of rape and sexual assault said to have been committed between 2006 and 2009.
Their mother, who was allowed to sit in the witness box as she took the oath, told the court she contacted social services last summer after the six-year-old alleged her older brother had touched her indecently. The woman also claimed the younger defendant had informed her that he had seen his brother lying on top of the six-year-old.
Recalling her conversations with her daughter, the mother told the jury: "I can't remember her exact words. She didn't say what had led up to it - she just said he (the older brother) would ask her to allow him."
Questioned about her decision to call in social services, the mother added: "I had been speaking to (the six-year-old) all week long in small stages. It was (the younger brother's) word and (the six-year-old's) word that prompted me to make that decision."
An older sister of the six-year-old told the jury last week she was also assaulted by the older boy at her Birmingham home and the home of a relative.
The 15-year-old defendant denies two charges of rape and four of sexual assault of a child, while his brother denies two counts of rape and two of sexual assault.
The trial was adjourned until Tuesday.