Given the speaker's word choices in the first 5 paragraphs, it seems unreasonable to me to claim that the speaker "has no idea" what Natalie means at the end of the story.
Had the author omitted the 2nd to last sentence in the story, I'd like the story more. It's still a perfectly good story if the speaker acknowledges that her man is infant-like, but loves him anyway. That would explain her word choices in the first 5 paragraphs.
But the speaker claiming to have no idea what Natalie was talking about leaves me feeling like the author chose to be deceptive for no other reason than to be deceptive (in the first 5 paragraphs) without regard to whether or not the words she was putting in the speaker's mouth made sense.