Thoster's job is to watch people and read them. If he couldn't read a person, he wouldn't be very good at conning them. But apparently he's distracted today, because a Spot check of 5 leaves him without a clue to her change in expression. Instead, he just focuses on the conversation at hand.

"Named her Alice, after my mother." He gets a slightly wistful look, as if he might actually have a heart beneath all that schmooze.