This is a kind of love. Well, I want to believe that you had it in mind initially that she will need to contribute to the upkeep of the house but you kept it inside of you. She gave you the chance to demand, I guess.
I must add that you are a good sister, nothing short of that. You don't want your sister to misbehave or put down your reputation and you didn't send her away.
RE: A second chance