Three Las Vegas parents are being held on a slew of sexual assault and abuse charges for allegedly raping their own children, KLAS-TV reported. 

Clark County prosectors say the amount of evidence against 48-year-old Christopher Sena, his wife Deborah Sena, 50, and his ex-wife Terrie Sena, 43, is overwhelming. All three allegedly sexually abused eight victims- including immediate family members- over a period of 12 years. 

"The number of acts over many, many years, some were consensual, some were not," Clark County District Attorney Steve Wolfson told KLAS-TV.

The father was arrested in September when investigators named him as the lead suspect in the gruesome sex ring. He was originally charged with sexual assault, but now the criminal complaint includes at least 23 charges, including child abuse, neglect or endangerment, sexual assault of a minor under 14 and lewdness with a child under 14, the Las Vegas Sun reported. 

Other charges include incest and production of child pornography, where Christopher Sena allegedly made videos of sex acts with his children. On one occasion he threatened to break one of the alleged victim's legs if they told of the sex acts, according to the criminal complaint obtained by KSNV. 

Investigators recovered a video of two of his children having sex with the family dog, according to The Daily Beast.

Deborah and Terrie Sena, who were arrested last Thursday, face multiple charges including child abuse and sexual assault of a minor. Reports revealed Tuesday that Terrie was a substitute teacher for the Clark County School District. She was removed as a substitute after her arrest, KSNV reported.  

The trio is being held at the Clark County Detention Center pending their court appearances this week. As the case unfolds, those who know the family were shocked and appalled to learn of the accusations. Christopher reportedly spent time posting Facebook pictures of happy family outings and writing comments devoted to his kids. 

"I've known you most of my life & never would have suspect you to be such a disgusting pervert," one outraged Facebook user wrote according to The Daily Beast. "...How could you hurt a child?"