I know.

[ it's quiet, and zuko exhales slowly. ]

But we can't rely on the Avatar to fix every problem that we have, and I can't rely on him to take care of my family.

[ aang has already done him a huge service, in taking care of ozai. azula is, and has always been, zuko's problem. ]

I know she's not stable, but she is right now. She can be reasoned with, and she's not stupid. I don't think she's going to do anything to jeopardize her position. We have time.