The girl’s now 18-year-old brother was also sentenced to stay in youth detention after being convicted of raping a child.
The mother denied the charges at at Östersund District Court in northern Sweden, but the court was satisfied that her daughter’s testimony was fully reliable.
The mother argued that her daughter’s story should not be believed, citing prior allegations directed at others who were later found to be innocent, according to the local Länstidningen Östersund (LT) daily.
The attacks against the child began back in 2002 when she was only seven-years-old and continued until 2009 when the abuse, which has been equated to rape in accordance with the legal definition of the crime, came to light.
The girl’s brother also stood accused of having repeatedly raped his sister from 2005, when he was 12-years-old, until 2009.
The court observed that neither of the children believed they had done anything wrong, and perceived their behaviour to be perfectly “normal”, according to LT.
The woman was furthermore ordered to pay 600,000 kronor ($90,000) plus interest in compensation to her daughter, with the brother ordered to pay damages of a further 100,000 kronor.