Wow your in Oakville?? Not far from me.
Anyways, what I would do is send her a card and Maybe flowers, explaining your her nighbour. Although you dont know this women nor did you know her husband, you are still a neighbor and will be for a while. After the funeral and after she calms down (no matter how long it takes) She will be outside of her home and realize that youve showed your sympathy and respect for her loss.
