You're lucky to have each other. Did your sister have a similar upbringing to you? [He's not prying, per say. He just never could pass up an opportunity to listen to other people's problems.]
[Gently.] No, they're not immortal. They're dead. I have many close friends who made it to Hell, as well as one of my sons. I had two others who never did. But death is a hard enough transition to help anyone make, I'm afraid. It's doubly hard when its someone I care about.