Wow,What a story
It shows how much love can change the world.
It shows the greedy of the little brother that destroy his sister's life
Also it show some of the disrespect between rich and poor people specially that they always have this idea that just because you are poor you will do anything for money which is not true.
Also it learn a lot of fathers to never shut the doors over their kids , you should let them out and help them if they face a problem and when they face a bad experience be there for them not to tell them "I told you so" but to support them.
Also it give an idea about marriage,don't get married from some one who is older than you with a lot of years cause that will make a huge problems in the future,so don't destroy your life like that