Looked for their eldest child, Charles on GRO Services.
Willshire Charles born Bridgwater [district which covers North Petherton], Volume 5c, Page 467, March quarter 1853, mother's maiden name IRISH
By the way, there are quite a lot of IRISHes in North Petherton
This looks like her christening:
Emma Sophia Irish, chr 10 Sep 1826 North Petherton, parents William and Anne
"England Births and Christenings, 1538-1975," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:N5WZ-TQS : 11 February 2018, Emma Sophia Irish, 10 Sep 1826); citing , index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 908,499, 908,500.
Maybe this will help in your quest?