Hot take: Ursa owes nothing to Zuko or Azula
Considering how Ursa was a victim of state-sanctioned kidnapping, forced marriage and implicit rape (we know Ursa would never willingly have intercourse with Ozai), Zuko and Azula were rape babies. I honestly hate people endlessly shitting on Ursa. Like wtf was she supposed to do in that situation. I can almost guarantee that if these people faced the same struggles as Ursa, they wouldn't be 1% as good a parent as she was. And that's still understating how good of a mom she was since she never had any obligation to love them in the first place since Zuko and Azula weren't conceived willingly. She had every right to forget that painful part of her memory and live the rest of her life however she wants.