Following Brian Lawson's message, I have looked up Ann Kermode in the 1841 census. Obviously your Ann and mine are not the same. There are four Anns aged 21 or 20 (20-24) in Rushen.

District 4, Page 1, entry 1. (your connection).
John age 60,
Ann age 52,
Ann age 21,
Catherine age 17,
Elizabeth age 15,
John age 23
William age 14

District 1 Page 5 entry 25.
Elinor Kermode age 65,
Ann Kermode age 20
John Christian age 4 months

District 1 Page 10 entry 55
Ann Kermode age 20
John Christian age 6 months
John Watterson age 30!

District 3 page 7 entry 35
Ann Kermode age 20
Regards
Bruce