love or money

The paper of this book is very bad. I think reading on Kindle is much better.

The story is about love or money. The mother is very rich while her children and sister are very poor. In the end, she was murdered on her birthday. Who is the murder? One of her daughters wants to be with her boyfriend. But her mother didn't allow them to be together because her boyfriend is poor. So eventually she killed her mother for love while the others got the money becoming rich people. But will they be happy?