For a man she knew was quite intelligent, Rodolphus could be painfully transparent at times. Did he really believe he was hiding his activities so well from her? She began to pick at her food. With no appetite and a legitimate fear that he could be drugging her, there wasn't much reason to eat. Unbothered by her lack of interest in the meal, Rodolphus carried on. Meager rations in Azkaban taught him to be appreciative of food, even a bit over-appreciative. It was the same with everyone who ever had a cell there. Some former prisoners, like her husband and Rodolphus, had the benefit of excellent genes to keep from growing too pudgy.