love cuck!Mai. Imagine Mai and Zuko in bed together when Azula just walks in in a robe and says, "Move, Mai. I'm having Zuko tonight," and Mai moves to one side of the bed and has to lay there and watch Zuko happily fuck his hot sister's brains out. Azula screaming and crying about how good Zuko's dick is and Zuko cursing and saying how wet and hot Azula's pussy is. And Mai? Mai just sits there, watching, noticing how Zuko never pounds her that hard.
Mai gets to read her books, at least until they're done when she's forced to 'clean' their genitals, she would probably be offended if it wasn't the most action she ever got, its Azula's goal to train Mai to somehow cum just from giving oral. She still gets to cuddle Zuko at night, even if she's sharing him with his sister even then.