I'm a woman. And I say, if Adele wants to end her time with Iain this way, let her. Wikipedia says they've been "together since 2006". In her position, I'd rather remember six years with a wild last year or so of doing all those crazy things that got put off than six years with a last year of just sitting there watching the man I love die.

Also it is quite possible that Adele would pretty much consider herself a widow for a good while whether or not she married Iain.

I mean, really. I don't think this is a thing being "done to her". I don't know anything about her, but if she's <em>anything</em> like the kinds of women Iain writes about, she's perfectly capable of making her own decisions, and is quite aware of what she's gotten herself into. And is, as you urge in your second sentence, trying to be strong and live life to the fullest.