A prior family members contest the will. My husband died a month after the will was executed. I have 2 minor children, what is my possibilities to win

What do you mean by "prior" family members?  Your possibilities to win cannot be known without knowing the specific factors of your case.  Namely (1) was the will valid and (2) was you husband competent when he signed the will.  Consider consulting with an attorney and letting him or her know the specifics of your case if you need help.