The attitude of the family is very nonsense. I mean, you took this girl as your daughter even if she is fake; you have to take responsibilities of her. You have to act as she is your daughter, you know, a family member, not like a piece of trash.
And later, you killed her? WTF??
She just wanted some love, but even if she is your daughter biologically you didn't mind. But being an illegitimate child is not her fault. Did you ask her if she wanted to be born with you being the father?
So many bullsh*t fact we have.