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A Duncan woman who married her biological mother last year received a 10-year deferred sentence Tuesday after pleading guilty in Stephens County to committing incest.

Court records indicate that Misty Velvet Dawn Spann, 26, was set for a bench trial Tuesday but instead pleaded guilty to illegally marrying 44-year-old Patricia Ann Spann, who is identified as Patricia Ann Clayton on their marriage license application, filed in March 2016 in Comanche County.

Patricia Span also was once married to her biological son.

District Judge Ken Graham gave Misty Spann a deferred sentence of 10 years, at least two of which must be under the supervision of the Oklahoma Department of Corrections, court minutes show.

Patricia Spann, who is also charged with incest, is to appear in court in January.

Incest in Oklahoma is a felony punishable by up to 10 years in prison.

Authorities say a state Department of Human Services child welfare investigator discovered information during an inquiry that led her to believe that Misty and Patricia Spann were involved in an incestuous relationship.