Berenice by E. Phillips Oppenheim

She came to him so noiselessly, that for a moment or two he was unaware of her entrance. There was neither the rustle of skirts nor the sound of any movement to apprise him of it, yet he became suddenly conscious that he was not alone. He turned around at once and saw her standing within a few feet of him. She held out her hand frankly.

"So you have come," she said; "I thought that you would. But then you had very little choice, had you?" she added with a little laugh.