Justin Miles Nuckols may be nearing the end of a 10-year prison sentence for attempted lewd conduct with a minor, but he now faces the possibility of staying a lot longer after admitting he accepted money in his prison account that his fiance earned by having sex with paying customers.

The 39-year-old Nuckols pleaded guilty late last week to a felony charge of accepting the earnings of a prostitute. He is set to be sentenced on that charge in front of 4th District Judge Lynn Norton Nov. 8.

The crime of accepting the earnings of a prostitute is punishable by up to 20 years in prison.

Prosecutors have recommended a three-year prison sentence for Nuckols as part of an arrangement called a "rule 11" plea agreement. If Norton does not accept the terms of the agreement, Nuckols would then be allowed to withdraw his guilty plea and ask for a jury trial.

Investigators say Nuckols’ fiance, 40-year-old Laura LeFavour, put money in his account in 2010 and 2011 before she was sent to prison herself for possession of child pornography.

When Ada County Sheriff’s investigators were tipped off about the case in January 2011, they had an undercover officer set up a meeting with LeFavour at her home. LeFavour offered to have sexual contact with that officer for $300, according to reports.

LeFavour was charged with misdemeanor counts of prostitution and illicit conveyance of materials, after investigators found she also had sent Nuckols nude photos in prison, according to court records.

Detectives say they have evidence that Nuckols spoke to LeFavour openly on the phone about sending money she had earned through prostitution to his prison spending account.

Sheriff’s officials say Nuckols had $1,600 in his account in January 2011, but they couldn’t say how much of that money may have come from LeFavour.

Ada County deputies arrested Nuckols in 2003 during a online sting operation in which they say he was caught trying to arrange a meeting with an underage girl for sex — only to find out that girl was actually a detective.

Nuckols’ sentence on that attempted lewd conduct conviction ends in April 2014, according to the Idaho Department of Correction.

LeFavour is now serving a 10-year prison sentence on a charge of possession of child porn. It was during the prostitution investigation that detectives found child porn images on a computer in the woman’s home, according to sheriff’s reports.

Ada County prosecutors eventually dropped the misdemeanor prostitution and illicit conveyance charges after LeFavour pleaded guilty to possession of child porn in July.

LeFavour also has a conviction for trafficking in a controlled substance from 2006, according to court records.