Wife (OED)

1. a. A woman: formerly in general sense; in later use restricted to a woman of humble rank or ‘of low employment’ (J.), esp. one engaged in the sale of some commodity.

1825 BROCKETT N.C. Gloss., Wife, a woman, whether married or not. ‘An apple wife’,{em}‘a fish wife’,{em}‘A tripe wife’. 1859 TENNYSON Guinevere 55 She..shuddered, as the village wife who cries ‘I shudder, some one steps across my grave.’

 2. a. A woman joined to a man by marriage; a married woman. Correlative of HUSBAND n. 2. (The ordinary current sense.)

3, c. (a) euphem. A kept mistress, concubine.