Yes, and George was 30 and Margaret was 39 in 1851!
5 Caroline Street, Cardiff (St Mary)
HO107 Piece 2455 Folio 527 Page 7
Definitely sensitive about their ages

but 1871 must be wrong, as in 1881 they are 62 and 63 years old, living at 25 Kent St
RG11 Piece 5283 Folio 76 Page 50