Instead of mimicking Natasha's pose, Alex leans back in her chair. She doesn't feel particularly casual, but she's trying to look it. That searching look and Natasha's sudden serious demeanor make Alex think that maybe this isn't a random meeting.

"Did you follow me here?" she demands, still speaking quietly in case they're overheard. She's been told she's paranoid, and maybe that's what she's being right now, but better safe than sorry.