Lestat claims he can’t leave because he has to look after his father, but, when his father needs him, he will not go. Here, Lestat is both selfish and childish, though his behavior hints at a genuine unresolved conflict between himself and his father. After all, Lestat is acting a little too much like he does not care. Louis, for his part, is enraged that Lestat seems to torture his father so, letting him suffer and making his suffering worse by, for instance, playing music loudly.