Madam Charles wasn't always like this.
She indeed cherished her reputation, unwilling to be accused of mistreating an illegitimate child. Besides, Wesley's biological mother never showed up in his life, and he was, after all, innocent. Thus, she ended up raising him in her home.
But there's certainly a difference between raising your own child and another's.
In front of outsiders, she would snatch toys from Oliver Charles and give them to Wesley.
When Oliver cried or caused a fuss, she would discipline him.
However, afterwards, she would buy Oliver ten times, even a hundred times as many things. While she spoiled Oliver, she hardly paid any attention to Wesley.
The most important thing in a child's growth is not material satisfaction, but education and companionship.
She hired the best teachers for Oliver and enrolled him in the best schools. However, she hardly put any effort into Wesley's upbringing.
Mr. Charles did not like Wesley and ignored him.