.
Was wondering about William's occupation could he have switched from bedstand maker to a grocer? I guess it is not impossible...
I was wondering about that also but the baptisms/births of Thomas, William, Samuel & Selina Turner do see to match up with parents William & Jane their abode in 1881 was Litchfield Road where William's ocupation is now a Fruiterer
Unfortunately I couldn't find the baptisms of their other children
Edward, Albert & Jane 
was hoping that they may show that their father William's occupation was now a Fruiterer
I did find marriages for Jane & Selina,
Lily's previously given father
William occ FruitererJane Harding witnessed the marriage of her sisters Lily & Selina
4 Dec 1898 St Peter & St Paul Aston
Jane Turner 20 f
William occ Fruiterer married Frederick William Harding
One witness was
Selina Turner11 Mar 1900 St Peter & St Paul Aston
Selina Turner 25 f
William occ Salesman married Thomas Lawrence
One witness
Jane Harding
Would love to find out where Florence ended up and with who
and if they do indeed have a half sibling, Elsie. Where did she get to?
Both girls are not married before 1911
There is this marriage entry but can't say if her middle name is Lily
FreeBMD 1916 Aston
Elsie L Turner to Walter Emerson

unfortunatley this marriage not available to view on line to check father's name etc....
As for
Florence Violet Turner marriage entry in 1911 Aston
you have managed to rule her out as not being the Florence you are looking for
There are many other marriages for persons named
Florence V Turner from 1914 onwardsbut none in Aston - it's difficult to say if any of those are her without seeing a m/c to confirm
father's name etc....
There is a death entry Birmingham 1916 for a
Florence V Turner age 17 born c1899 , your Florence V Turner was born c1893 so I guess not
a match
Perhaps she married without using her middle name there are quite a fews marriage entries on FreeBMD (searched counties Warwickshire after 1911) for persons named Florence Turner
1914 Aston Pursall no births
1918 Aston Bloxham birth Florence A 1919 Aston mmn Turner
1923 Aston S... male birth 1924 Aston mmn Turner
1924 Aston S.....
as she was living in Aston it's quite probably that she married in that area