EXCLUSIVE: Porn Was Found on Josh Duggar's Computer When He Was a Teenager, Source Says

Josh Duggar was already watching pornography when he was a teenager, a source close to the family tells ET.

The 27-year-old former 19 Kids and Counting star admitted that he had become addicted to pornography -- and then retracted the admission -- in August, shortly before he checked into a faith-based rehab. But on Wednesday, a source told ET about an alleged incident dating back to when Josh was a teenager.

"A Duggar family member once bought a computer from Josh and found explicit porn saved on the computer," the source says. "They went to discuss what they found with [his father] Jim Bob and were told, 'Not my son. It must have been on the computer before he got it.'"

WATCH: Duggar Family Bracing for More Josh Duggar Bombshells -- 'Who Knows What Else Will Come to Light'

A representative for the Duggars had no comment.

In May, Josh admitted to molesting five young girls -- four of whom were his younger sisters -- as a teenager.

"Back 12 years ago our family went through one of the most difficult times of our lives," Josh's parents, Jim Bob and Michelle Duggar, said in a joint statement at the time. "When Josh was a young teenager, he made some very bad mistakes, and we were shocked. We had tried to teach him right from wrong. That dark and difficult time caused us to seek God like never before."

After a second scandal involving Josh rocked the conservative family in August -- when Josh's name was tied to two Ashley Madison accounts and he admitted to cheating on his wife, Anna Duggar -- the couple said their "hearts were broken."

"As we continue to place our trust in God we ask for your prayers for Josh, Anna, our grandchildren and our entire family," Jim Bob and Michelle said.

Last week, a family source told ET that the Duggars have recently been shutting each other out. Though this past Thursday, a plane carrying Jim Bob, one of his sons and two unidentified passengers, was spotted at an airport in Rockford, Illinois, near where Josh has been in treatment at a faith-based rehab center. The sighting had some speculating that Josh is headed to the Duggar family home in Springdale, Arkansas, for Thanksgiving festivities.

"Nobody communicates and it's weird and tough," the source told ET. "I think they just don't really trust a lot of people right now, so they want to keep things on a 'need-to-know' basis."

WATCH: EXCLUSIVE: Josh Duggar Has 'No Remorse' For Being Unfaithful to Anna Duggar

Meanwhile, Josh is now facing new legal trouble. Danica Dillon, an adult film star who claims that she was offered money to have sex with Josh twice in March and April of last year, is asking for $500,000 in a lawsuit that alleges that he caused her "physical and emotional injuries."

According to the legal documents, Dillon says Duggar committed battery against her during their alleged sexual encounters, and felt "as if she were being raped."

In September, Dillon sat down exclusively with ET and went into detail about her physical encounters with the oldest Duggar son.

"He threw me on the bed and, in all honesty, though it was consensual it more or less felt like I was being raped," Dillon claimed.

Watch below: