Sentence:  A somewhat less fragmented hebephrenic patient of mine , who used to often seclude herself in her room , often sounded through the closed door - as I would find on passing by , between our sessions - for all the world like two persons , a scolding <WSD>mother</WSD> and a defensive child . 
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)