The 36-year-old woman from Michigan, was charged with two counts of first-degree criminal sexual conduct.
The woman's husband was arrested in June on 12 counts of first degree sexual misconduct after it emerged he repeatedly raped the three-year-old, took illicit photographs of her for his own 'sexual gratification' and made her watch child porn.
The man admitted to detectives he may have attempted to have sex with his daughter six times but that in reality it occurred 'too many times to remember'.
The mother was not initially charged with anything even though police knew she was present during the abuse and did nothing to stop it.
Since then additional evidence came to light and prosecutors were able to arrest her.
The mother admitted after her husband was arrested that she assisted him while he attempted to penetrate their daughter more than once, holding her hands 'so it wouldn't hurt so much' while he held her legs if she 'tried to get away', according to documents.
The couple’s daughter told authorities her mother took pictures of her 'private parts' and her dad had sex with her and smacked her with a belt.
The abuse is believed to have begun late last year and continued until May, MLive reports.
The man told detectives when he was arrested that he is a 'sex addict' and has gambling problems. He also said he was sexually abused as a child, as did his wife.
The couple would watch porn and have sex in front of the children.
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