I was thinking all roads lead to it.

[ She doubts that he would simply let her leave, after all. ]

We need the heart. What more could you possibly need to know?

[ Honestly, she doesn't know what people don't know. Within their own ranks, it's well known what power the heart yields. Considering who it belonged to, it's no surprise. ] If it makes you feel better, it's probably easier this way. Less dangerous.