They were found guilty of rape, aggravated sexual assault of children, forced prostitution and distribution of child pornography following a two-month trial that began in June, according to BBC News.
Her partner, Christian L, 39, was also sentenced to 12 years.
A German mother and her partner were convicted and jailed Tuesday for repeatedly raping the woman's young son and selling him to pedophiles on the internet, abusing him for more than two years in a case that has horrified the country.
The court ruled that the man, who had a previous conviction for child abuse, must remain in preventive custody after serving his sentence.
They were ordered to pay a total of £38,000 in damages to the boy and another victim, a girl.
Prosecutors had demanded a 12-year prison sentence. As for that footage, investigators have said it brought them "to their limits".More news: Barcelona rope in midfielder Arturo Vidal
More news: Britain to adop new opt-out system for organ donation
More news: MoviePass limits users to 3 movies per month in pivot to survive
Local judicial and child services officials came in for massive criticism for having interviewed the mother after concerns about the boy's welfare arose months before the couple's arrest but failing to get his own account.
A Spanish national received a 10-year prison sentence on Monday after admitting that he had raped the boy on at least 15 occasions and had paid the mother and her partner more than 10,000 euros.
It led to the arrest of eight people who have been charged with belonging to an online paedophile ring.
Mr Bürgelin then said the abuse continued out of financial incentives.
The case has shocked Germany and sparked a row over how the couple were able to sell the boy for sex for thousands of euros even though they were already on the... The boy is in foster care and, per his lawyer, doing OK considering what he has been through.
The mother was often near the scene of the abuse by other men "to exert a calming influence on her child", and in the case of one client participated herself, the court said.