It was so pleasant to sit there looking up at her as she lifted now one book and then another from the shelves, fluttering the pages between her fingers while her profile was outlined against the warm background of old bindings, that he talked on without pausing to wonder at her sudden interest in so unsuggestive a subject. But he could never be long with her without trying to find a reason for what she was doing, and as she replaced the first edition of La Bruyere and turned away from the bookcases, he began to ask himself what she had been driving at… She paused before him with a smile which seemed at once designed to admit him to her familiarity and to remind him of the restrictions it imposed.
Edith Wharton, House Of Mirth