To the horror of all and the surprise of none, eventually Toph and Iroh got so used to their little charade that they figured, why not do it for real while we're at it, and then Zuko's children ended up with Earthbending cousins.

There was no way the staunchest of the old politicians could say the Queen of Omashu was a misalliance for the Fire Lord' uncle. Zuko ended up with a headache of monstruous proportions anyway, but that was his default state, so hey.

Iroh never did get the snapdragon field as a dowry, but Toph had given him leave to use the palace's roofs as his own gardens so he managed to deal with the disappointment somehow.