What actions does Lisa take that very much please Frank when he arrives home quite late one evening?

When Frank arrives home very late one evening, Lisa brings the children in to say goodnight to him. This both amazes and pleases Frank. He realizes that as long as he can remember he has been used to human warmth, from his Russian business contacts, from his employees, and even from his servants. All Dolly offers him is a fearless, affectionate glance.