OK thanks, I think OP has some info mixed up

. The 1891 Mary A does not have Drinkwater in brackets.
Beat me to it with that 1871 jim, I was still typing

. OP thought George was on his own..
Still looking for Sarah....and perhaps George died 1871 - 1881 & Mary Ann's father is John Drinkwater? Sarah is widowed in 1891.
ADDED: Can't yet find a suitably aged George Wright death in Worcestershire 1871 - 1881 on freebmd. Might it be worth obtaining the 1863 marriage certificate to find out Sarah's father's name?
Marriages Jun 1863
COOPER Sarah Alcester 6d 734
WRIGHT George Alcester 6d 734.
There are quite a few Sarah Cooper baptisms around 1840 in Warwickshire on familysearch.