Y'all need to calm down. This is just a comic and if y'all haven't read your share of transmigrated/isekai/villainess comics, then I can't help you. I am here just for the ride.
And you can't say she's groomed him. She's done nothing to manipulate him to thinking she's the only one he can depend on, that he can't live without her, whispering sweet nothings into his ear. She only has tried to "manipulate" him into being a better person so she doesn't get kill. Last thing she wants is to be a pedo-ice queen.
I hope it doesn't go into them together but seems like it will with the typical webtoon formula.