That’s a fair assessment… As for the dialogues between Tina and John—yes, there could have been more, and I could always add them. But some things were spoken through their eyes, and what John understood needed no words.

but maybe she knew John was married to her cousin.

Nopes! She was completely oblivious.

Tina stood a few steps in front, waiting for her bag. She looked over her shoulder and smiled, sharper now, as though she already knew the weight she’d slipped into his hand.

her eyes like small fires — a spark that had tugged at him for three straight hours.

Still, I don’t dispute your view, you must have had a particular image in mind.
Thanks a lot:)