It's a bit of a surprise that he mentions his mother. He has before, and never in a good context. It makes her feel a little guilty over her excitement at being able to help the professor with his research.

"I'm sorry," she says, her voice gentle. "I'm sure it wasn't his intention. And I think you could be a trainer, if that's what you wanted. I only said what I did because I know that we both have responsibilities outside the Nexus."

When he smiles again, she returns it warmly. "Of course I'm happy. I got to spend some quality time with you." A thought strikes her and she laughs sheepishly. "Although I'd probably be less happy if I had been bit. Thank goodness for the anti-violence field, right?"