Tracy Kelso is accused of abusing the girls earlier this year, but further proceedings on his case have been delayed for months because of mental exam that needs to take place in Medford.
Judge Micheal Gillespie gave Kelso's attorney three more weeks to finally finish the exam and have the results presentable to the court just days before Christmas.
Victim's families have been told the exam will determine if a pornography addiction Kelso is accused of having played a role in the alleged sex abuse acts.
Kelso is currently out on bail, and a trial is expected to be scheduled next month if a plea deal is not accepted.
Keslo faces three counts of sexual abuse. He was arrested last summer after a six week investigation into the abuse of the two girls, 5 and 9-years-old.