My stepmother and her sons (undue influence on her) are taking everything from my father's estate. Do I have rights?

My father died on May 26, 2020. My stepmom (my dad's 3rd wife) and her sons (my step brothers) are taking everything from my dad's estate. They are not even honoring what was designated to myself and my 3 other sisters (we are the biological daughters). They have also stopped all communication with us (even the PR has not communicated). We just recently (looking on our own) found they had put the estate up for sale and it sold. No communication. We received and inventory list that was sketchy and slim. My dad's tools alone (4-car garage with loft filled to the brim) only amounted to $1700.00. This is a joke. My dad and stepmom supposedly have identical wills and there is a clause/statement that says: The distributive provisions in this Will and in my wife's Will are to be considered a binding contract between us. In the event of the death of one of us, the surviving spouse shall be prohibited from revoking, amending, or changing his/her will with regard to the distribution