She wasn't wearing a wedding band. He hadn't let himself look too closely at her delicate fingers before in lessons. But now as she took the book from him, that was the first thing he noticed. There was no golden ring on her finger and no tell tale mark where one had been. Did that mean Cho had never moved on from him? Or just that she hadn't felt the need to have a family? Perhaps teaching was her calling...
She looked back as she walked away and with that one look, he had his answer. She would have worn a ring if he'd been the one to give it. 'Cho!' He took a step towards her, then paused, stunned at the ridiculousness of his thoughts. 'I- I'm sorry.'