Let me just correct their reaction (cause why not 😉)
Arjen: our mother? You're right, she's insane. She definitely didn't and would never ever deserved a guardian. She's an alcoholic, an abuser, and a mentally unstable one at that. But are we at fault for her lack of sanity?
Arien: yeah, I mean, it's not like we could choose from whose womb we'd come to this world. And by the way, if you're so ashamed to have illegitimate children, it's you who should refrain from f**king with someone other than your legal partner. Why are we being blamed for something when we don't even have the power to do anything about it?