Cousin of S.A.-area man accused of sexually assaulting 8 foster girls accused of raping teen Juan Antonio Rivera allegedly repeatedly raped a foster child in his cousin's care in Bexar County.

The cousin, Juan Antonio Rivera, 34, faces a charge of sexual assault of a child. He was booked into the Bexar County Jail on a $50,000 bond. The cousin, Juan Antonio Rivera, 34, faces a charge of sexual assault of a child. He was booked into the Bexar County Jail on a $50,000 bond. Photo: Bexar County Jail Photo: Bexar County Jail Image 1 of / 24 Caption Close Cousin of S.A.-area man accused of sexually assaulting 8 foster girls accused of raping teen 1 / 24 Back to Gallery

The man accused of sexually assaulting at least eight of his foster daughters allowed his cousin to repeatedly rape a teen in his care, according to an arrest affidavit.

The cousin, Juan Antonio Rivera, 34, faces a charge of sexual assault of a child. He was booked into the Bexar County Jail on a $50,000 bond.

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Rivera is the cousin of Miguel Briseno, a suspect in eight sexual assault cases in Medina and Bexar counties. Officials and former foster children have said Briseno ran a girls home in Von Ormy and later in Devine, Texas, in Medina County.

At various times, he had up to 12 foster girls living with him and his family, and law enforcement authorities have estimated as many as 180 girls passed through his home.

Briseno was first verified to receive foster children into his Von Ormy home in the 19500 block of Morin Road in 2002, according to Child Protective Services. Rivera, who was around 18- or 19-years-old at the time, lived on the same property but in a different home, according to the arrest affidavit.

The victim told authorities Briseno gave Rivera permission to do whatever he wanted with the victim because she was his "property," according to the affidavit. Briseno also told the victim, who was 13-years-old at the time, to do whatever Rivera wanted or else he would kick her out of the foster home, the affidavit says.

RELATED: Sheriff: S.A.-area man accused of sexually assaulting 5 foster children took in 180+ girls

According to the affidavit, Briseno would regularly bring the victim to Rivera's home and allow him to sexually assault her. This happened numerous times between September 2003 and May 2007, officials said.

Afterwards, Briseno would take the victim home. She told Bexar County deputies that Briseno told her "that if she ever said anything about what happened (sic) that he would kill her," according to the affidavit.

Briseno was arrested on Oct. 11, 2017, on five charges of sexual assault of a child. Three of the charges stemmed from his years at the Von Ormy property, and the other two originated from his home in Devine, Texas. Since he was jailed, he has been indicted on at least five more sexual assault charges in Medina County for a total of seven. He's being held on only one charge from Bexar County, and it's unclear whether the other two charges were dropped and whether he has been or will be charged in connection with Rivera's accuser.

The victim whom Rivera allegedly raped reported the years of sexual assault to Bexar County deputies on Oct. 16. Authorities secured a warrant for his arrest on March 29 and jailed him on Tuesday.

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Caleb Downs is a crime reporter for mySA.com. Read more of his stories here.| cdowns@mysa.com | Twitter: @calebjdowns