[There is a weak, choked laugh.]

He has a family? Pity the woman who slept with him, no offense to your existence.

[He lets out a long breath to focus on the conversation at hand and not the illness wreaking havoc on his host.]

I hate to break it to you, but your grandfather is something of a murdering psychopath. Un-invite him to the reunion. Send a vague card instead of a tie for Father's Day. Etc. Etc.