I do not have the name of Isaac's wife. He was the son of Bailey Forbes (b.abt1810) and Mary Rogers (b.abt1810). There is a Lydia Forbes listed as 5 years old in the 1860 Camden County census. Her parents are Thomas 36, Chisline 35 and siblings Mary 7, Martha 4, and Thomas 2. This family does not seem to appear in the 1870 Camden County census.
Sorry I couldn't be of more help.