There is not enough detail here to answer your question. You probably need to consult a probate lawyer with the specifics.

Your question is confusing. If there is a home, deeded to your wife and her father, your wife's share cannot be divested from her. You need to see...

If there are assets in her name, you will have to go through probate. her children can disclaim their interest, but you still ahve to do it.

You need to hire an attorney who is familiar with these types of cases. This is not something you can do yourself. You should contact legal aid.

It is impossible to answer that question based on the information here. You need to consult an attorney, with all the documents you do have, to...

First, the 2013 will would still be valid if he didn't revoke it. Second, in order to probate it you need to actually have it - you can't go by...

It depends. If they can establish their kinship through other ways - birth certificates, etc., then a DNA test probably would be considered too...

Your question is too complex to answer fully here. You need to consult a probate attorney with all the specifics and find out what you can do to...

Although what happened may have been disconcerting, I cannot really see any damages that would make it economical to try and pursue a case.

I am not sure what you even mean by "birthright". Kentucky does have laws of intestacy, but your rights would only be the same as any other heirs...