Uh-oh. The widower's friend and his five-year old daughter invited themselves to come live with him to help him deal with his loss and we've immediately cut to the daughter at, shall we say, marryin' age.
I was up for "sad old widower learns to love again, precocious child involved in some way" but I do not wish for who he learns to love to be the precocious child he has been raising like a daughter for fifteen years.
They make a whole thing of how much Daughter of Widower's Friend looks exactly like Dead Wife, but, I mean, well, yes, they're both played by Norma Shearer! It's not even identical cousins, they're not even related!
The Widower dies in the middle of a chess game basically immediately after letting go of the hate he still felt, or something like that, as the punchline to a running gag where he keeps falling asleep in the middle of chess games.