The usual way is to obtain the birth certificate - which will mention father & mother, address, occupations, etc.
However, I can't find a birth for Bridget on FreeBMD?!

Where did you find the information that she was born in 1889?
EDIT:
Maybe this is her birth?
March qtr 1890
St Olave district Vol 1d, page 261
Downing, Bridget
It would be worthwhile getting hold of the birth certificate!