The smile was a kind smile, and Spock recognized it as such, but it wasn't exactly the smile that he usually received from his mother nor was it the quiet acceptance, pride, and encouragement he was used to either. He reminded himself that to expect such a reaction was illogical, but even that didn't stop the small swell of disappointment that washed over him. Rather than risk her realizing as much, he busied himself with shutting the door behind her. By the time he'd looked up at her again, he was once more composed.
At her next words, Spock felt something almost akin to relief. Quiet honesty. Now that was something he was accustomed to and could appreciate. Granted it didn't make this situation any easier, but at least it was familiar.
"Nor do I," he admitted, averting his gaze for a moment and trying desperately to think of something to say to fill the silence. Finally he looked back up at her, adding, "It is good to see you, even if the situation is a wholly illogical one which should not be possible."
There. It wasn't exactly the most typical conversation one would have with a parent, but this wasn't a typical situation either.