What happened to Zuko's Mom in (avatar)? This is what I said to my friend!?

Your theory seems to check out..until.. when Azula grins, she grinned because her father probably attacked the fire lord at that point or her fathers plan was playing out perfectly... either way someone had to be attacked, also I believe Zuko's mother is on Ember Island remember when Zuko told aang and the gang about how his mother loved it there, it is still in the fire nation which means if she was seen by any royal enforces she would be reported, because on the day of the black sun it was revealed that she was banished , this uming that Ozai wasn't lying, then again if he knew that Zuko's mother was dead wouldn't he have rubbed it in Zuko's face to aggrevate him so he could kill him when the eclipse ended, also with the Zuko's mom ember island thing that was an obvious clue ( why else would they show that episode it was to foreshadow the location on Zuko's mom, Zuko was there twice in the whole series, it was obviously a strong hint on the where abouts of his mother, I believe that Azula and Ozai were not working together so Ozai could take the throne at all, It clearly says that Urisa did it for Zuko, Azula was obviously aware of this ,because again.... like you said she had experience with spying, the mystery of where Zuko's mother is, was just a little gateway, a loose end so that if Nick wanted to continue the show they would be able to..,but seriously she is in Ember Island!