What does wearing this sash mean?

[Treetotal]

I'm wondering if your aunt is a friend of the deceased and not a relative, so is wearing the black sash just as a mark of respect. She also looks as if she has a black bow or hat on her hair.
There are several photos on Google images of children wearing black sashes, even one of a baby wearing black bows on the shoulders.
Pat

Yes I agree Pat...I have seen those too...also as Skoosh suggested, it could be to honour the death of Queen Victoria.
Carol

[Phil Antony]

Here's the whole picture so you can see Emilys' sister-in-law and the other relatives I mentioned. You can see the small bouquet of flowers fairly clearly attached to the sash.
I have had a look at Victorian/Edwardian sashes that were worn either for fashion or mourning, and haven't really seen one attached in the same style as the picture.