"Take care of yourself but,
You're nothing but trouble.
Just the damage of thought,
You'll never recover from.
How you love,
A world you're only dreaming of."
"You, The Room & The Devil on your Shoulder."- by As It Is.
Jack looked at the man who had once been Sam's fiancé. No matter how he looked at him he didn't get it. He kept looking and all he saw was someone who was the complete opposite of what Sam was. How she had seen anything in Jonas Hanson was just beyond him. He was so deluded and arrogant and so many other things Jack couldn't even begin to comprehend.
Walking beside Sam he asked her without prying too much, it was her personal life after all. She had told him that to start with Jonas was perfect, yet things changed with time. The more she thought back the more it didn't surprise her he had been led down the path they now found him on. Jack could see Sam was struggling with everything so he tried to lighten things up as he always did. When he asked if she found herself attracted to the lunatic fringe he wasn't sure how to take the look she shot him. Maybe he didn't want to know, for both their sakes.
Telling Jack that Jonas had always been a problem, he had demons he couldn't and wouldn't share. When it finally came to the crunch she had made her choice, Jonas was something that had to be removed. Yet when the time came she couldn't do it, he had won again.
It was Jack that finally ended it, killing Jonas before he killed them all. It wasn't Jonas that Jack was concerned about, it was Sam. She told him she had the chance to end it but couldn't. Jack said he understood, it was all he could say. His main concern was the planet and its people safety, as well as his own team which included Sam. She needed time to get over what had happened, what she had seen and done in regards to her ex-fiancé. He would give her it, but told her he would be there when she was ready.