That Thomas (58) is the father of Christiana (29) is fairly certain.
Maria's name comes from the most likely baptism for Chrissy.
There is a likely marriage for Thomas and Maria Wakeman which says she was a widow.
George Wakeman Harris was baptised about 6 weeks before they married, his parents listed as Thomas and Maria Harris.
It is possible that George was therefore the son of her late husband.

Thus the fact that Maria was the name of Chirstiana's mother seems fairly certain.
However, further identification need more work and corroboration.
It would help to find Christiana in the 1841 Census, but she has not been identified.
  

There is a Maria Notie who married Robert Wakeman at St Martin Worcester on 28 January 1812.
No other marriages for Maria to a man named Wakeman on FamilySearch from 1810 to 1817.
(There is a Robert Wakeman who married Mary Anne Nichols at Claines in 1819 and they later had children baptised.)

Robert and Maria Wakeman had children baptised as follows:
1812 Jun 03 - Charles at St Andrew Droitwich
1814 Jul 03 - James at St Andrew Droitwich
1814 Jul 03 - George at St Andrew Droitwich