Thanks for translating!
So... Ummmm. Can we talk about sis for a sec? We knew she was screwed up in the head, and pretty cruel (arguably just evil) - I'm starting to think there is literally an issue here... It could just be artistic exaggeration at play, but she's giving me demonic vibes.
Don't misunderstand, I'm not trying to give her an out... I've said in past chapter discussions how she is utter sadistic monstrous scum, and a sterling example of why the obsessive/possessive to the level of violence "love" thing (I forget which -dere this is) creeps me out so much...
But I'm trying to figure out if something is afoot, or is she just so grotesque and reprehensible that her art design is starting to reflect it?