Meg's posture relaxed, just a fraction. This was truly upsetting him, that much was clear. She wasn't sure which bothered him more...the apparent mind control or the fact that he'd hurt one of the only people in the world he cared about. She would never be in the Dean Winchester fan club, but she knew what he meant to Castiel. And she knew what Castiel meant to her. She didn't like seeing him upset, no matter how internally he might keep that. Eventually those pesky human emotions would catch up with him, start spilling out, but for now, she knew his face well enough to read the expression there. She'd made a point of keeping him hidden out of partially selfish reasons, but now she was glad she had done it. Would Dean have come banging on the door if he'd known where to go? Sometimes she just wanted to reach into that boys abdomen and start pulling out anything squishy she could get her hands on.
"I can..." she started, but stopped. If she finished that sentence, she knew she'd have to go, at least for awhile anyway. There was no way she was going to voluntarily enter a room that had Dean Winchester in it ever again, if she could help it. She couldn't decide what to do. One minute she wanted nothing more than to run away from him, the next she hated the thought of leaving him alone. But she knew her place, and it was to do the right thing by him. "I can contact him for you. I can tell him where you are...if that's what you want."
She sighed, looking anywhere but at him. "I'll go back to my place so you boys can have your little heart to heart or group hug or whatever it is you humans do." It was a petty thing to say, and she regretted it once it crossed her lips, but it was too late to take it back.