A German couple was jailed for raping the woman's son, and selling him to pedophiles for a two-year period on the dark net.

They were found guilty of charges including rape and forced prostitution of the boy on Wednesday.

Abuse of the boy was filmed, with footage showing him tied up and verbally abused.

Several other men have been convicted in separate trials for sexually abusing the boy.

The boy, now 10, was nine years old when the trial began earlier this year.

Warning: This post contains disturbing and graphic details.

A woman and her boyfriend have been convicted for the repeated rape of the woman's young son and for selling him for sex over the internet.

The German couple was accused of allowing multiple men they found on the dark net to rape and abuse the boy in exchange for thousands of euros over the period of two years, Deutsche Welle reported.

The dark net is an anonymous part of the internet that cannot be found with mainstream search engines.

They were also charged with more than 60 acts done toward the boy, which included extreme humiliation, physical bondage and rape. Some of the abuse was filmed, with footage showing the boy tied up and verbally abused.

A court in Freiburg, southwest Germany, found the pair guilty of rape, aggravated sexual assault of children, forced prostitution, and distribution of child pornography on Tuesday.

The boy, now 10, was nine years old when the trial began in June.

Defendants Berrin T, far left, and Christian L, far right, six with their lawyers in court on August 7. Pixelation done by Getty in accordance with court orders. Ronald Wittek - Pool/Getty

The boy's mother, identified as 48-year-old Berrin T, was jailed for 12 years and six months, while her partner, 39-year-old Christian L, was jailed for 12 years. German media typically refrains from revealing full names of people involved in ongoing criminal cases.

They were also ordered to pay €42,500 ($49,100) in compensation to the boy and another victim, a young girl.

The pair confessed to abusing the boy themselves as well as selling him to men online, Deutsche Welle said.

Christian told the court in June, when the trial started, that the boy's mother was the "driving force" behind the crimes, according to German news agency DPA. He denied the accusation that he had put pressure on his partner to allow her son to be raped.

Christian also has a previous conviction for child abuse, and must remain in preventative custody after his sentence.

Inside the courtroom that jailed the couple on Tuesday. Patrick Seeger/dpa via AP

The couple was arrested last year alongside six others. Several other men have been convicted in separate trials, including a 33-year-old Spanish man who was jailed on Monday for repeatedly sexually abusing the boy after he faced trial in the same court, the Associated Press reported.

Officials removed the boy from the family in March 2017, but a local court sent him back weeks later, even though the mother was supposed to be prevented from having contact with children.

The boy is now living with foster parents.