An automatic not guilty plea is entered for Linda Rinehart, 47, whose husband fathered four children with their teenage daughter.
She was arraigned Monday in Cass County District Court on two counts of endangering the welfare of a child and one count of hindering prosecution.
Authorities say the woman did little to stop her daughter's sexual abuse.
Danial Rinehart, also 47, has pleaded not guilty to second-degree murder, child endangerment and other charges.
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Prosecutors believe that Danial Rinehart impregnated his daughter four times and had been having sex with her since she was 13. The daughter is now 19 and only one of the four children she birthed is still alive. The father is charged in one of their deaths.