I'd like it more if it was closer to the game's art style and not so dark, but it's a great idea for a picture. I love all the wholesome art of them being cute together like normal siblings too.
Seems inevitable that at some point they'd think like "So... Um... I can't help but notice we're both kinda... We're kinda hot. 🤔"
Thank fuck I don't have a hot sibling. I'm sure I'd never act on it but it'd be awkward as fuck.