An Oklahoma mother and daughter are behind bars after it was revealed they had an incestuous marriage.

Patricia Ann Spann, 43, and Misty Velvet Dawn Spann, 25, were married in March 2016 in Comanche County.

It has since been revealed that Patricia Spann, also known as Patricia Clayton, was previously married to one of her sons, Jody Calvin Spann, in 2008.

Mother and daughter Patricia Spann, 43, and Misty Spann, 25, have been arrested after it was revealed they had an incestuous marriage in Okahoma

Patricia and Misty's relationship was discovered by the Department of Human Services in August during a child welfare investigation inside their home in Duncan

That marriage was annulled by Jody Spann in March 2010 for reasons of 'incest', according to reports.

Patricia and Misty's relationship was discovered by the Department of Human Services in August during a child welfare investigation inside their home in Duncan, according to KFOR.

KSWO reports that Patricia told investigators her relationship with her son was not sexual and she married him to prevent him being deployed to the military.

However, she told investigators that she 'hit it off' with her daughter when they were reunited two years ago and they married in the hopes of adopting a child.

Under Oklahoma law, marrying a close relative is considered incest whether or not a sexual relationship exists. Those found guilty can face up to ten years in jail.

A warrant was issued for the arrest of mother and daughter on Friday and they were both charged with incest and booked into the Stephens County Jail.

On Wednesday, the two women appeared before Judge Ken Graham, according to the Duncan Banner.

Both pleaded not guilty.

Authorities said Patricia Spann told investigators she had lost custody of her daughter and two sons, who were adopted and raised by their paternal grandmother

Misty and Jody's brother Cody Spann said his mother manipulated both his sister and brother into marriage

Authorities said Patricia Spann told investigators she had lost custody of her daughter and two sons, who were adopted and raised by their paternal grandmother.

The mother told police she didn't believe she was breaking any laws by marrying her daughter because her name is no longer listed on Misty's birth certificate.

Misty and Jody's brother Cody Spann told KSWO that his mother manipulated both his sister and brother into marriage.

'I think she's worthless she put my sister into this. She forced my sister into this, there's a lot of people that know it,' he said.

'For 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.'