You know, I don't know what these people were like in terms of their attitudes, and I tend to think that having just had your sister die might not be the best time to get married.
But I also think that western culture has a particular and in some ways ver romanticised view of marriage, where many others are much more pragmatic about it. Is this a good person, do we have similar values, can we get along living as a couple, will we be financially stable, etc.
This kind of situation seems a little different when instead of seeing marriage as what you do when you're in love, loving someone is what you do when you're married.