Hello Auzzie

Welcome to Rootschat!
If you are confident that Lilian was born 1913 in Pontardawe, there is only one on freebmd. Lillian M Jones, mother's maiden name Evans, born December quarter 1913 Pontardawe volume 11a page 2135.
Phyllis Jane Jones born 1910 (March quarter)
Pontardawe volume 11a page 1126
Have you tried looking for the family on 1911 census, which is pay to view.
http://www.1911census.co.uk/This will help confirm the name of Fred's wife and how long they had been married.
Kind regards
Morgan