Sentence:  Her <WSD>mother</WSD> wrote Kate of her grief at the death of Kate 's baby and at Jonathan 's decision to go with the South `` And , dear Kate '' , she wrote , `` poor Dr. Breckenridge 's son Robert is now organizing a militia company to go South , to his good father 's sorrow . 
Meaning of the word marked with <WSD> tags:  a woman who has given birth to a child (also used as a term of address to your mother)