As everyone else has said, your mental health is much more important than anything else. Take care of your mother (strokes are nasty, and the presence of family can help a surprising amount), and take care of yourself, too. We can wait, confident that the game will be all the better because you took your time and didn't force yourself to work on it when you really needed the time for other things.
(And, if it's not impertinent, best wishes to your mother for as speedy and complete a recovery as possible, from someone who also had a stroke this summer and is gradually rediscovering this thing called walking.)