she was barely conscious of her hands squeezing his buttocks , instinctively goading , wanting the rocking to be harder , faster , wilder , until the waves turned into one continuously rolling crest , the explosive spasms of his climax driving it , and she floated off into a space where she was only anchored by him , his arms wound securely around her as she lay on his chest-a heaving chest that felt like the gentle swell of calmer waters after riding through a tempest .