Deirdre had her glass halfway to her mouth when Jack slipped on 'Saturday', and it was obvious that she caught it in the way that her hand faltered for one second. Once she steadied it, she continued the motion to take a drink, a little deeper in order to give her time to steady herself for her next question.
Politeness be damned, she thought, and leaned forward to set her glass on the table in front of them, turning herself more toward Jack to look at him directly. She considered him for a moment, trying to catalog which of his quirks she knew, and what might give hints to his 'character', if what people were saying was actually true. After a moment, she admitted to herself that she really didn't know that much about him, other than what he presented. Taking a risk in him thinking that she'd gone totally insane, she dared to ask a question that didn't quite flow with the previous conversation.