"A male--even such a male as Tibby--was enough to stop the foolery. The barrier of sex, though decreasing among the civilised, is still high, and higher on the side of women. Helen could tell her sister all, and her cousin much about Paul; she told her brother nothing. It was not prudishness, for she now spoke of "the Wilcox ideal" with laughter, and even with a growing brutality. Nor was it precaution, for Tibby seldom repeated any news that did not concern himself. It was rather the feeling that she betrayed a secret into the camp of men, and that, however trivial it was on this side of the barrier, it would become important on that. So she stopped, or rather began to fool on other subjects, until her long-suffering relatives drove her upstairs."