Jack derives a feeling of strength from belittling Wendy, a strength she completely invalidates by not reacting back out of her own ego. She doesn't scream at him or sink to his level, though he is clearly (over) acting like a child (it's within her 'right' to be angry). Danny might be Theseus slaying the minitaur, but Wendy is the hero of this movie. It is she who subdues Jack with the bat and traps him in the fridge, it is she who saves her son out the window and waits for Jack armed with a knife, and it is she who finally faces the visions (the bear, the elevator, the skeletons) at the end of the movie.