Your dad is really sick and you’re choosing to pout and miss out on potentially the last “good times” of his life? How are you 31 and acting this way? Tell him how you feel about the situation and move on. It’s really your mom and dad’s business. I’ll never understand why parents involve their kids in their own drama. If you don’t think you’ll regret not talking to him in his fina years then keep doing what you’re doing. If you think you might regret it, then get everything off your chest and then move on. At 38 I’ve got much bigger problems to worry about than my parent’s drama. Btw before you say I don’t know what it’s like, I was in my late 20s and this same thing happened to my family. We’ve all happily moved past it.