If it were you to die instead of your uncle, Wouldn't you want your wife to have it? She helped you make the money not your family. She is still alive and has to provide for herself for the rest of her life.
I've been through what you're going thru and it will tear families apart.
Which do you want? your family or the money?

My grandfather just passed away and my step grandmother is in a nursing home. I gave my share up to her. She needs it worse than I do.

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I am here for only a short time on this earth. My goal is to make everyone I see smile if only for a moment.