In 1881 Catherine was aged 39 born Jurby.

From http://www.familysearch.org

Paul CURRIN Head M Male 40 Douglas, Isle of Man, England Porter
Catherine CURRIN Wife M Female 39 Jurby, Isle of Man, England
Paul CURRIN Son Male 6 Douglas, Isle of Man, England Scholar
Mary Ann CURRIN Daur Female 2 Douglas, Isle of Man, England
Source Information:
Dwelling 17 James Street
Census Place Onchan, Isle of Man, Isle of Man
Family History Library Film 1342346
Public Records Office Reference RG11
Piece / Folio 5603 / 43
Page Number 1

Brian Lawson's births index has:
CORRAN, Mary Ann b.15 May 1879 Douglas [father] CORRAN, Paul [mother] JOUGHIN, Catherine.
CORRAN, Catherine Marg 18 May 1880 Dou CORRAN, Paul JOUGHIN, Catherine
CORRAN, Esther 5 Jul 1887 Dou CORRAN, Paul JOUGHIN, Catherine
CORRAN, Harriett Maria 10 Mar 1884 Dou CORRAN, Paul JOUGHIN, Catherine
CARRAN, Stephen 18 Dec 1881 Dou CARRAN, Paul JOUGHIN, Catherine
CORRAN, William 12 Sep 1889 Dou CORRAN, Paul JOUGHIN, Catherine

Interesting if there were two Cath Joughins born Jurby of around the same age, with one being the niece in 1851? Or Cath could have been the illegitimate daur of Daniel, rather than Andrew?

Sue