A woman and her daughter were charged with incest after getting married in Oklahoma this year, authorities said.

Patricia Ann Spann, 43, and her daughter Misty Velvet Dawn Spann, 25, were married in March, police learned last month while conducting a child welfare investigation. Authorities later found out Patricia Spann had married her son in 2008, who filed for annulment 15 months later citing “incest.”

The motivation behind the marriages is unclear.

Both women appeared in Stephens County district court on Wednesday, the Associated Press reported. Under Oklahoma law, marriage between close relatives is considered incest whether or not a sexual relationship exists.

Patricia Spann told child service investigators that she had lost custody of three children, who were adopted by their paternal grandmother. She reunited with her daughter two years ago, the AP reported. Spann said she thought it was OK to marry her daughter because her name wasn’t on Misty Spann’s birth certificate.

Both women are being held on $10,000 bonds.

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Mahita Gajanan at mahita.gajanan@time.com.