The first two paragraphs of this sentence are neat, that is, if she just turns her head and smiles, she feels puzzled, but the second paragraph is long and procrastinating, which makes the misuse of nouns pile up like a mountain.
At first glance, I thought it was too foggy to see each other's smiles. Maybe what this person wants to express is that he laughs confusedly, so don't use two nouns as adverbials. Syntactic errors are naturally unclear.
It can be said that the most beautiful thing is that you look back and smile, which makes people ecstatic.