@Finn dAbuzz,
My sympathies to you, Finn. You seem to be a rather responsible, supportive, and grounded individual. Your wife will learn, probably, much more about you as time goes on.
Like your wife, I haven't experienced losing a very loved person, my family was never close. So, in this way you are a very lucky man, just look what you had that isn't really lost: An extraordinary father-in-law whose influence will always be with you.