"The boxer shorts weren't even his size," said White's attorney, Frank Murphy. "But it was one of those things that if you turned her down, life became miserable for you."
Named as defendants in the lawsuit are Mayfield, the Montgomery County Correctional Facility, Warden Lawrence V. Roth and Deputy Warden Julio Algarin. It asks for at least $150,000 in compensatory damages.
The Daily News was unable to reach Montgomery County prison officials for comment.
Mayfield, 42, is also charged criminally with exchanging sex for snacks with three male inmates, including White, at the prison. Under Pennsylvania's institutional sexual-assault law, it is illegal for prison guards to have any kind of sexual contact with inmates.
Mayfield, who is on paid leave from the prison, is out on $5,000 bail and faces trial on those offenses later this year.
Her attorney, Jeffrey Allen Sigman, said White was lying.
"Gene White is now attempting to kill two birds with one allegation," he said. "One, he's using it to explain the contraband in his hands, which he faced prosecution for, and two, he's now trying to make money off the same lie."
White, 24, began his sentence at the prison on Oct. 30, 1997. He was convicted of conspiracy to commit burglary and possession of marijuana with intent to distribute and was sentenced to 21 to 42 months.
In January 1999, Mayfield got White assigned to the commissary to work for her, the lawsuit says.
"Once he was there, she started flirting with him and grabbing him, saying, 'You're an inmate, I'm a guard. Do what I say or you're going into solitary,' " Murphy contended.
Over the next month, White said that Mayfield performed oral sex on him five times and that she unbuttoned her pants another time so he could fondle her.
She gave him hundreds of dollars worth of free items from the commissary in exchange for the sexual favors, he testified at a preliminary hearing earlier this month.