Something amused flits across the girl's face and the confusion in Yennefer's expression heightens. They are still in these early stages of feeling each other out, and Yennefer has not yet decided whether she likes the girl or not. It has nothing to do with whether or not they'd met before now, but more so how this conversation will go, something Yennefer is still trying to decide.

It is, however, the mention of Jack that has her giving a small snort. "The same sphere...then you two know each other?" That has brought some amusement into Yennefer's tone; which may or may not make sense to Sabine, depending on her level of knowing Jack Townsend. And depending on if she finds him as infuriating as she does entertaining, which is apparently where Yennefer has found herself after their lessons.

"Don't tell me you have the same penchant for..." Yennefer gestures vaguely, trying to find the best way to describe Jack's...well. Everything.