You should respect the partners of others.
Josh invited Art, a wealthy businessman, to his place for dinner, and Art brought his wife with him.
Josh wants Art to feel welcome.
Josh makes sure that both Art and his wife are happy and feel welcome in his house.
Josh ignores Art's wife and gives all of his attention to Art.
Art's wife feels like she belongs and doesn't regret coming to Josh's place.
Art's wife feels invisible, and this makes her feel like a trophy wife.