- Had a closer look. Could you have meant 1834, not 1854, for their marriage?
If so, this is probably them in the 1851 Braddan census:
Philip Cain 46 Farm labourer b.Braddan, his wife Catharine Cain 40 b.Ballaugh, and children Philip 14 farmer's son and Mary Ann 10, both b.Braddan.

Mary Ann Caine bapt 23 AUG 1840 Saint Lukes, Baldwin. Father Philip Caine, mother Catharine Waterson. [See IGI - plus 4 other children 1835-1843.]

Sue