SIOUX CITY | A 24-year-old man has been arrested after he allegedly had sex with a teenage girl against her will while she was babysitting.

Court documents say Colby Mauch committed the crime in the 17-year-old girl's Morningside home on Sept. 3, 2016.

Mauch, of Castana, Iowa, came over to the victim's residence while she was babysitting six children and starting making sexual advances towards her, the documents said. 

Feeling uncomfortable, she called a friend to come over. The three-- with the children-- watched a movie. The friend then had to leave and the kids went into the backyard. A short time after, the documents said Mauch grabbed her while she was standing up and placed her on the couch. Mauch started to kiss her mouth, neck and stomach and forcibly pulled her pants and underwear down and then had vaginal intercourse with her.    

After the incident, he asked the victim not to tell anyone and she then went into the bathroom and took a shower because she felt "disgusting," the documents said. 

The girl told the friend what had happened and the friend notified a school resource officer, who told the victim's mother. The victim then took a sexual assault examination at a local hospital where she recounted the story.  

On Sept. 12, Mauch texted the mother of the victim and apologized. The mother brought the texts to police and then an officer responded as if he was the mother. A text conversation began where Mauch said he regretted his actions and admitted the victim was telling the truth to the officer who was pretending to be the mother.  

Mauch was brought into questioning on Oct. 6 and admitted to initiating and having sex with the victim. However, he claims the sexual activity was consensual, the documents said.

He was booked into the Woodbury County Jail on Wednesday for third-degree sexual abuse.