An Alabama couple who wanted a baby repeatedly sexually assaulted an underage girl in hopes she'd get pregnant and give them the infant, authorities said Monday.

Court records show Jeremy Swann, 29, and wife Amanda Swann, 28, both of the Jones community in rural Dallas County, were charged with rape.

District Attorney Michael Jackson said the man's mother also was charged with contributing to the delinquency of a minor for allegedly knowing what was going on and failing to intervene.

Cole said the couple had filed a complaint with the Department of Human Resources, stating they wanted full custody of the victim because Amanda’s mother was sexually assaulting her.

“While the DHR was there investigating those charges, the girl told investigators that Amanda and Jeremy had been sexually assaulting her,” Cole said.

Court records show that Amanda Swann tried to talk the mentally incapacitated girl into having sex with Jeremy Swann so she could get pregnant and have a child for them. Later, she watched as the man repeatedly assaulted the girl, according to a sworn statement from an investigator.

The girl screamed during the assaults, which occurred over the past month, and at least once the man gagged her with a ball to keep her quiet, the statement said. Amanda Swann did nothing "because she wanted (the victim) to have a baby for her," the document said.