Sentence:  “... it isn't my notion of the way to bring up a girl to give her up, in extreme youth, to an <WSD>intimacy</WSD> with a young married woman who's both unhappy and silly, whose conversation has absolutely no limits, who says everything that comes into her head and talks to the poor child about God only knows what ...” 
Meaning of the word marked with <WSD> tags:  Intimate relationship.