to use my dead neighbour's washing machine?

[OKComputer]

I know this is weird, but my neighbour died last week. She was 95 and I was in and out of her house a fair bit over the past few months, helping her out and generally keeping an eye on her.

My washing machine has broken and we're running out of clean clothes. I also have a key to her empty house...

When I originally suggested it to DH (jokingly) we cringed. But then I wondered:
is it really unethical to use her washing machine for a couple of loads?

When my dad died, we had to clear out his house and dispose of a new washing machine, new fridge freezer, freezer and tumble dryer, along with lots of other items.

If you'd been his neighbour OKComputer, we would have given you the lot with grateful thanks for your care.

If I were you, I'd use the machine but leave a note and perhaps contact the other keyholder to make them aware too?