Cain headed back to his house after dropping off his boss, he was really worried about Christie hearing that Jason tried to hurt her wasn't part of the plan, he tried his best to prevent this from happening because he knew that Christie's life would be in danger once she signed that but Christie was too stubborn to listen.
Just the first day of work and Jason attempted to stab her, who knows what he meant try to do next.
Cain was so worried about Christie that if only she would come back to her senses and quit this job while it was still early and he would talk to his boss about it.
Cain came back to his apartment and noticed that the lights were on meaning that Christie was back from work.
He got in and saw her sitting at the couch watching her interview. He was a bit confused. Normally Christie would still be terrified with what happened earlier today but seeing her right now watching television it just seems like she lied.