I don't think she'd have understood empty house meant no owner

shed likely just think her owner out or in bath or something.
better really to keep her away in my view to try and break off the connection to that house.
different had the lady died at home, then it does pay to let the animals see the body as that they do seem to understand. I did it with my Grans dog and cats when she died at home and also my own dog who loved her dearly saw her and by the way they all flattened and retreated after sniffing her they did know.
a reassurance they could do for the little dog is to collect up some of the old ladies clothing to give her items for her bed , same as one does with a pup taking a piece of the dams bedding to give a pup a bit of reassurance.
its not easy. glad the little one came to no harm during her flight and I hope your bite heals quickly.