She is smiling like the lady who knows that in the room she walks into this evening for a formal dinner, she will very likely be the strongest person by far. She will make wives and girlfriends jealous and angry and their male partners hard and aroused. She will catch them staring longingly at her, smile at them and enjoy her meal. Her date for the evening will be exhausted by the time she lets him go to sleep with a silly smile on his face.
Cute