Winston Graham said this quote

And what of this young woman beside him, whom he had loved devotedly for four years and still did love? She had given him more than Elizabeth ever could: months of unflawed relationship, unquestioning trust (which he was now betraying in thought) . Oh nonsense! What man did not at some time or another glance elsewhere? And who could complain if it remained at a glance? (Chance was a fine thing).