My little sister is pregnant?

I just found out my little sister who is 14 years old is pregnant with no supported father. She is still in school but she is a huge school girl with perfect grades. How should I act to her? So far 3 of my brothers support her. But my 2 sisters and my parents hate her. I feel like she can easily manage her life be cause were so rich, Im not angry I just feel it is funny.