I hate when people complain about the age gap, in this case also the fact that Nowa raised Airi, like mf you read 113 chapters and still talking about it? If you don't like the idea the hell did you read 113 chapter in the first place? Just the smut, not the plot, I see I see.
When you go to read raw chapters instead of talking too much and making people anxious (like me who cries for everything) go read the comments in your language. I had to go read raws bcs reading the comments here made me feel so bad I was dying. And it was all good instead, don't talk too much without knowing a shit. Matthew would never hurt Jin. Said so, if you have go write a spoiler, be sure first, don't make shit assumptions and make people go crazy.