Read the following context and answer the question.
Context: When it wore off and she woke in the middle of that night - Tyrion was awake and reading - he slept poorly , Sansa knew that . " Poor Margaery , " she said softly almost to herself , but her lord husbands hearing was sharp . " You do n't envy her ? "
Question: why does Sansa not envy Margaery ?
Answer:


Margaery had seen her husband poisoned horribly and was upset by this .