This is a curious line, doubtable on the face of it, which should make us look deeper. The girls, who adore Nostromo, would certainly be thinking of him, despite their being with Mrs Gould. On the allegorical level, I believe this refers back to Teresa's line "save the children" (of which Nostromo has not yet heard). The (very subtle) implication is that the "children" of the Earth would no longer be looking to the People as their saviour; they would instead be looking to upper-class altruism, represented by Mrs Gould. Note Nostromo's use of Mrs Gould's title, emphasizing her upper-class status.