OK

More than homophobia, I think it's jealousy because her own son adores a character from a novel than herself (but that's just my own interpretation)

The homophobia was a joke mainly cuz I'm a woman and we'd be the perfect lesbian couple lol. I don't think it's jealousy as much as genuine fear for Kim Dokja since if YJH is the one he loves the most then she has the possibility of losing him. If she was the one he loved the most then he'd never die because she'd never kill him. It could be a bit of jealousy but it's mostly fear