My sister and I (residents of Illinois) are named both as co-personal representatives and as co-heirs in the will of my late aunt (resident of Arizona). I want my half of the remaining assets (a house in Arizona and some savings bonds); my sister refuses to cooperate (she won't agree to put the house up for sale, and she won't agree to cash in the savings bonds) and also refuses to explain why. My aunt died in 1996, and as much as I hate to consider legal action against my sister, I don't know what else to do. What are my rights in this matter? and/or What can I do?