[timroy]

No, I (and presumably the other posters) can tell the difference - I just disagree on the morality, partly because I think the legal aspects are related to the moral aspects.

The guy purchased the right to the house once the current owner dies, but you believe it's immoral for her to continue living in it, or renting it out, or loaning it to friends, while she is alive. I think it's immoral to demand the house while she's alive, since that wasn't the deal.

Sometimes legality and morality are widely separated, but here they seem related.