Well, to answer my own question here

There was not a marriage to GEORGE FIELDER before the birth of two daughters.
They were registered in both surnames- FIELDER and KAYE
IN 1889/REG B44346 KAYE May
Father-
Mother ,Mary McCarthy
IN 1887/REG B39934 KAYE Louisa Mary
Father -
Mother Mary McCarthy
IN 1887REG B39934 Louisa Mary Fielder
George
Mary McCarthy
IN 1889 REG B44346 May Fielder
George
Mary McCarthy
Sue
ADDING
In 1899
1899 REG B20375 Fielder George
To Kaye Mary