Hi Lynne ,
I have searched the IOM and UK , looking for a remarriage or death of Sarah.
I could only find one that was close, the death of Sarah Crellin, Liverpool 1869 aged 60.
I tried using Jean's search for Sarah, but got no joy looking for this Sarah.
It will cost you money, but you could get this DC to eliminate her.
I did find a death of James Matthias Crebbin, May 6, 1908, killed in a mine in Transvaal.
Strangely I also found a Baptism of a Mary Ann Crebbin at St James Church, Liverpool 20/5/1832 to William Crebbin, and Sarah. Sarah's surname not given. Could this be an earlier child ??