www.nationalarchives.gov.uk has:
WO 97/519/18
Covering dates 1799-1821
Scope and content
WILLIAM MOBLEY
Born STOURBRIDGE, Worcestershire
Served in 34th Foot Regiment
Discharged aged 34
Access conditions Normal Closure before FOI Act: 30 years
Closure status Open Document, Open Description
Held by The National Archives, Kew
Restrictions on use
The 34th Regiment of Foot, 1st Batallion, were in India in 1819 -
http://www.regiments.org/deploy/uk/reg-inf/034-1.htmThis seems a possibility. However,
www.1837online.com's overseas regimental birth indexes (available on free trial, just put in 1870 but for these records all years are on the same page) shows some Mobberlay/Mobberly children b. to somebody in the 53rd Regiment, which was in India in 1819 as well:
http://www.regiments.org/deploy/uk/reg-inf/053-1.htmThe children were:
Mobberlay, John R, 1828, Golden (53rd) vol 18 page 10
Moberly, Susanna M, 1832, Stockport, vol 18 page 6
Moberlay, Susanna, 1832, Stockport, vol 18 page 11
(there are often more than one entry for the same person)
also
Mobley, Elisabeth, 1825, Devizes, 53rd (vol 17 page

Of course, it is also possible that her father was not a soldier but a merchant, in the civil services, etc. On the marriage certificate, does it give his occupation?