I'm sorry your in this situation
I don't think your wrong for anything. You don't owe him anything, he wasn't there for you growing up, and now all of a sudden you have to take on the "childs duties"? I think that is up to each indivudual person in your situation, and no one has any right to judge you because of your decision. If his sisters want a viewing so bad, then they should pay for it themselves. Did he give you money to go to school? Was he there while you were growing up? What do those who are making you feel like the bad person think of what he did to your family?