Castiel felt a wave of relief when he saw Mary rushing out to greet Ben. That was two Winchesters that he could see right now, know with a true certainty that they were alright. Technically, it was three Winchesters, Megan needed as much protection as the rest of them.
"Some other people believed they were his family," he told Mary quickly. "Ben didn't exactly play along with the illusion." A trace of pride may have been noticeable in his voice.
He focused his attention on Mary, more than a little concerned for how she was dealing with all of this. "How are you?" The unspoken question that was if she was handling the stress well enough.