It is possible that she is the widow of a Lucas.
She worked as an Ind in 1841 and resided at High Street, Needham Market, Suffolk. 1 (seems to be sharing the house with a Thos or Nat Agar and a servant girl)
Ann married (Husband of Widow Ann of Needham Market) Lucas, son of (Source of Stowmarket Area) Lucas and Unknown. ((Husband of Widow Ann of Needham Market) Lucas was born Cal 1780.)
1 FreeBMD Online Index of BMD, England & Wales, www.freebmd.org.uk, 1841C.