Man describes his mother as 'worthless' for marrying his sister

'She forced my sister into this, there's a lot of people that know it,' says Cody Spann

Cory Spann has condemned his mother Patricia Spann, 43, for marrying his brother and sister

A US man has publicly condemned the actions of his mother, who married his sister after a previous relationship with his brother was annulled.

Patricia Spann, 43, has been arrested along with her daughter Misty Spann, 25, after Oklahoma Police found out they had married in March.

Under Oklahoma state law, marrying a close relative is considered incest whether or not a sexual relationship exists.

Cody Spann, another of Patricia Spann's children, told KSWO: "I think she's worthless.

"She forced my sister into this, there's a lot of people that know it. Why would you to want to put your own daughter through this, what kind of person are you?"

"If that's what you want, that's on you. But none of us kids want that, and now you got my sister behind bars because of your choices, why don't you let that sit on you as a mom."

Patricia Spann told investigators neither her of relationships with her son and daughter were sexual.

Mrs Spann said she had lost custody of three children, who were cared for by a grandparent, but reunited with her daughter two years ago.

She stated that her motive for marrying her son was to prevent him being deployed with the military and that she married her daughter in the hope of fostering a child.

Ms Spann added that she thought it was a legal match with her daughter as she was not listed on Misty's birth certificate.

Both women were being held in Stephens County Jail in Duncan, Oklahoma.

State authorities found out about the illegal relationship in August, discovering at the same time that she had married one of her sons in 2008.