Yes, he knew and mom knows, too. But there was a lot of people in the chat room and they were all on and talking at once. Not all were 14. They ranged in ages up to 17, just a year younger than him. He's paying very dearly for a stupid mistake.
I paid dearly for 40 years after being a victim of child sexual abuse. Being abused for several years by two different men puts a little different perspective on things. However, anyone wanting to have sex with a child should be put away.
I spoke with all my children about the dangers of not knowing who they were talking to and what was said in chat rooms.