Narcissa was still displeased that her son had all but publicly attacked her sister, who in turn ran off to live in the woods for several days to frighten her half to death. The theatrics on both sides was quite distasteful. Perhaps that was why she would eventually choose Lucius Malfoy. He seemed quite... undramatic.
Now, however, Narcissa was not happy with the trait. "You've been quite adept at staying off most people's radar, it would seem, Mr. Malfoy," she said pertly.