To find my father or not?

Stuck with a mum that couldn't care less about her 2 brothers and a older sister with a different father to her, a twin brother who him and herself were to believe their father had died of cancer, and a younger sister who was the result of a one night stand and also very spoilt. Elly's life wasn't the best. Until a project given by her school to uncover a secret from her family's past found images and the name of her possible father who was still alive. Should she try and communicate with him or would he not be the right man.