Read it through once

Isabel was apparently on the point of assuring her cousin for the third time that he was odious; but the discussion was interrupted by the arrival of the lady who was the topic of it. She came rustling in quickly, apologising for being late, fastening a bracelet, dressed in dark blue satin, which exposed a white bosom that was ineffectually covered by a curious silver necklace. Ralph offered her his arm with the exaggerated alertness of a man who was no longer a lover.