DALLAS—The next trial of an East Texas swingers club accused of forcing children into sex shows was postponed Monday amid new allegations that the foster father to the young victims molested other children.

But prosecutors said that California child sex charges against John Cantrell, who has custody of three siblings who allegedly performed inside the club, has nothing to do with their case in Texas.

Cantrell, 64, was charged last week with sexually assaulting two of his foster children in 1990. Margie Cantrell, his wife, has denied the allegations.

Margie Cantrell first told authorities in 2005 about what the children— who are now ages 12, 10, and 7—revealed to her about having being forced into sex inside the windowless rooms of a former daycare.

“What does the fact that he was investigated 18 years ago, when the victims in our case were not even alive, have to do with the guilt or innocence of these defendants on trial today?” Smith County District Attorney Matt Bingham said.

State District Judge Jack Skeen Jr. pushed back the start of Patrick Kelly’s trial until June 30, granting a request by Kelly’s attorneys to allow time to investigate the charges against John Cantrell.

Texas Child Protective Services has temporarily forbidden the foster parent to see the children. Cantrell has bonded out of Wood County Jail and is awaiting extradition.