Hi Ann. That makes things much clearer, thanks. I had found the 1901 census return which I thought looked like William Edwin and family, but this had Rose Ann as his spouse:
1901 census
Name: Edwin Brew
Age: 36
Estimated birth year: abt 1865
Relationship: Head
Spouse's name : Rose Ann Brew
Gender: Male
Where born: England
Registration Number: 644/10
Registration district: Anderston
Civil Parish: Glasgow St Mark
County: Lanarkshire
Address: 10 Whitehall Court
Occupation: Ship Rigger
ED: 8
Household schedule number: 5
Line: 22
Roll: CSSCT1901_304
Household Members:
Edwin Brew 36
Rose Ann Brew 30 b.Glasgow, Lanarkshire
Edwin Brew 7 abt 1894 - b.Glasgow, Lanarkshire
Alice Jane Brew 4 abt 1897 - b.Glasgow, Lanarkshire
[From the Ancestry.co.uk transcript.]

As Harry (presumably) was not yet born, or living elsewhere, he seems to be the key as to what happened to Alice. What was his birthdate? Do you know whether his name was Harry or Harold, and like father William, did he have another name?

Sue