One of three Las Vegas parents charged in a gruesome sex ring that involved their own kids has agreed to plead guilty, her lawyer said Tuesday.

Terrie Sena, her ex-husband and his current wife are accused of engaging in sexual relationships with at least eight children and recording videos of the assaults.

Prosecutors made a deal with Sena, who told police she was attracted to teenage boys and girls, the Las Vegas Review-Journal reported. Her lawyer Tom Pitaro said she is to plead guilty to one count of sexual assault,  a charge that could send her to prison for 10 years to life.

Her ex-husband's wife, Deborah Sena, was given the same offer.

"It's a substantial punishment. I think it's fair, given all the circumstances," prosecutor Jim Sweetin told the newspaper. "If they're willing to come forward and admit their culpability, it's a fair offer for them to take responsibility and basically save the children from having to come in and testify."

Both women were arrested in December after police found recordings of them sexually abusing children during a search of the trailer they shared with their children and Deborah's husband, Christopher Sena, in Las Vegas.

Together they face dozens of charges, including child sexual assault, incest, lewdness with a child and using a minor under 14 to produce pornography. Christopher Sena, the alleged leader of the sex ring, reportedly also faces dozens of sexual assault and child porn charges.  

The husband was previously arrested in September when his wife and one of their alleged child victims went to a lawyer and disclosed the abuse investigators say went on for over 12 years.

Deborah Sena's lawyer hinted she might not accept the plea, saying her client is the victim of domestic abuse at the hands of a man who kept her under constant surveillance.

"I'm very uncomfortable with a victim of domestic violence signing up for 10 to life in prison for something that she never was an active participant in," lawyer Kristina Wildeveld told the newspaper.

"She was coerced to do any and all that she is charged with."  

Wildeveld's client has until Feb. 5 to accept or decline the prosecution's offer.