Responses
But it's normal for some people to not age mentally. I know some people who are 40 year old with kids and still act like an 18 year old to the point where they only have teenage friends because it's impossible to talk with people of the same age...
I actually find this webtoon a lot realistic even though it's a fantasy genre (▰˘◡˘▰)

I keep trying to defend Ercella but it keeps getting harder. Despite coming back after living once and regretting, I find it hard to believe she was once over thirty. It seems as if she’s still an eighteen year old who just adopted a fifteen year old son. And I would’ve rather she apologize first before trying to get closer to her son. I understand that she was quite young and easily influenced but her maturity level doesn’t seem to be at the level that a woman in her thirties would be. I’m just a little disappointed so far with the story but I’ll stay because I read the spoilers