What should you do if you are a 34-year-old mom and just found out that your 81-year-old father sexually abused your brother and two nephews and you want nothing more to do with him?

I'm not certain what your exact question is, but you are totally right to be concerned as a parent as well as to be upset by this disturbing news. I have similar issues in my family, and I simply refuse to have contact with or allow any other family member to put my children in contact with the person that did these things. Also, most communities have counseling available at low to no cost if that is a concern. You may want to consider at least a few meetings with someone to talk about this news and work through your feelings and your response.