Anon asked: how would the rest of the gaang react to zucest? would they be ok with it or think it's gross?
Toph would find it weird, but also really funny, and just see it as something new she can use to tease Zuko about. Aang would be very confused and maybe a little grossed out, but would try to be understanding and accepting.
Sokka and Katara would probably have the most negative reactions, and could even stop talking to Zuko for a little while. Suki would think it's gross and disturbing, but she has other shit to take care of and incest is one of the least awful things the Fire Nation royals have done, so she'll get over it.
In the end, I just can't see them all not coming around once they see that Zuko really is happy with Azula and that they're good for each other.