You overhear from the Council cupbearer that she's been worried ever since she accidentally interrupted Rowan March and Winifred Bordeaux having a heated argument over a Council member's growing interest in preserving trade with the Free Cities and Thorne. As there are only three Council members - Rowan, Winifred, and Josselyn - you can conclude who they were arguing about. Observing Josselyn throughout the banquet will suggest she's distracted and displeased.