I may be off here but;
So did May die between 1842-1847 and Henry remarry or take up with Elizabeth?
COTTEN, HENRY, Mothers mn HORE****
GRO Reference: 1846 S Quarter in NEWTON ABBOT Volume 10
COTTEN, CAROLINE ELIZABETH, Mothers mn HORE****
GRO Reference: 1849 D Quarter in GREENWICH Volume 05 Page 221
There is a Elizabeth HORE christened 26 December 1806 West Teignmouth, Devon, Mother ELIZABETH Hore