Backstory!? This can only mean...redemption and/or death!
In all seriousness though, I'd feel bad for auntie if she weren't a natural-born egoist who craves superiority over others and manifests that desire in constant verbal assault on her niece. The adultery isn't great either, but it seems like her husband is doing the same sorta thing so let's let that part slide as an unspoken "unhappy marriage" arrangement.
I was under the impression you were a girl from earlier messages, so no idea where that impression came from. Either way, keep up the good work.