Why does Holden choose to pay more attention to a woman in the theater than the actual movie?

Holden was uninterested in the movie to begin with, but then he saw a woman who was crying during the entire movie. He thought the movie was unrealistic and extremely phony, but the woman, with a child who needed to use the restroom, was believing the whole thing. She was only proving to Holden how phony she really was. She was crying throughout the movie, so some people may think she was, but with Holden being right there he knew she was a phony because her kid had to go to the bathroom and she would tell him to behave himself.Holden found this phony woman to be more interesting than the movie and he felt bad for the little kid.