Having a quick look Peter Oakley is listed as son-in-law. This is an alternative for step-son.
So Ann Vick appears to be Ann Oakley nee Day.
I can't see any births registered for Peter or Robert
Gloucester BMD have these with mmn Oakley/Day
VICK Ellen OAKLEY 1857 Cheltenham Cheltenham, Cheltenham 37 415
VICK Ellen DAY 1857 Cheltenham Cheltenham, Cheltenham 37 415
VICK George DAY 1862 Cheltenham Cheltenham, Cheltenham 46 497
for info. ann's death
Ann Oakley Vick, age 70 9 Northfield Terrace
Burial Date: 20 Oct 1896 St Mary’s cheltenham
Register Type: Parish Registers
Is this another marriage for Richard Oakley or just another with the same name
20 May 1861 Birmingham, St Jude, Warwickshire, England
Richard Oakley 52 widower occ packer Father: Richard Oakley occ farmer
Spouse: Elizabeth Hemming
Alfred Albert OAKLEY
mmn HEMMING 1864 D Quarter in KINGS NORTON
Henry Howard OAKLEY
mmn HEMMING 1866 D Quarter in KINGS NORTON
from GRO indexes showing mmn
added - Richard's age 63 and occupation on 1871 census with Elizabeth is a Gardener -
Helen Amelia OAKLEY
mmn HEMMING1862 D Quarter
The Richard Oakley marriage to Elizabeth is available to view online perhaps comparing the signature of both Richard Oakley's to see if they look similar