I Became the Female Lead's Younger Sister in a Period Novel

The first part is okay, although there are a lot of typos, but the plot is okay. But in the second half, the heroine helped the hero raise the child of his benefactor, which made me uncomfortable. It should obviously be the male protagonist's responsibility, but it feels like the female protagonist is doing everything. Is the heroine the nanny hired by the hero?

Bland period articles are relatively rare; lately they are all a bunch of cheats

There are a lot of typos, and character names are often written incorrectly.