The Collaborative International Dictionary of English v.0.48:

Mother \Moth"er\, v. t. [imp. & p. p. Mothered; p. pr. & vb.
   n. Mothering.]
   To adopt as a son or daughter; to perform the duties of a
   mother to.
   [1913 Webster]

         The queen, to have put lady Elizabeth besides the
         crown, would have mothered another body's child.
                                                  --Howell.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mothering \Moth"er*ing\, n.
   A rural custom in England, of visiting one's parents on
   Midlent Sunday, -- supposed to have been originally visiting
   the mother church to make offerings at the high altar.
   [1913 Webster]