[She has no idea about the reason for the change in his body language, but she straightens in turn, clasping her hands defensively - if primly - in front of her. Tenseness is, oddly enough, more familiar ground for her than overwhelming concern, and it makes her feel more secure.]
We're acquainted. [That's putting it very mildly.] And while it's true he has many friends, I'm sure he's in a better position than me to let you know who those are.