
I think she partially still thinks him a small child thus the curfew and judgement on his nail color. She also may be religious with the "Devils nail color" comment so he is probably trying to put on a good son show to her but hiding his true self all the while. I first thought it was creepy because she's treating a young man like he's still a kid which is normal for some older people with their kids, but idk, it still weirded me out all the same

I don't think it's particularly creepy in context... like yeah the scene was hella creepy but it seemed to have been dramatized that way, I just think she's a mum doting on her grown-up child lololol but i suppose if it's like a obsessive nightly ritual or something then THAT seems problematic
Idk about you but I got weirded by out the mum who kissed him good night "good night my angel" idk it's just geh, usually people stop doing that after like 10 or 11 years old