What happens to people, by people I mean my father, who cause a divorce when there is small children involved?
Any decision we make we are held accountable before God for the consequences of our decisions, whether they be choices which lead to eternal life (freedom and liberty), or eternal damnation (prison and captivity).
I would sincerely hope that your father is completely aware of his decision and that he is willing to repent of his sins.
My concern Rose, is more inline with how you are feeling. Although, your father has caused great turmoil within your family, please do not allow yourself to become so angry that you yourself forsake that which is good. Learn from this experience and grow from it, such that, you never make a choice like this for your own family.