Barty didn't want Chas to beg him for something he couldn't do. He wanted her and he knew that she knew it. Not like this, though. He wouldn't have her like this. Maybe it was fucking stupid, but he wanted all of her, not just a romp against a wall when he'd being going home to someone else thirty minutes later. His growl vibrated deep in his throat as he shook his head. "No," he said roughly, "not yet." He hadn't meant to add that hopeful word to the end of that, but maybe he was hopeful that he'd be able to give in to her completely one day. He wasn't sure.
For now, he worked his fingers inside of her more fervently, his thumb rubbing over her in circles, wanting her to fall apart, to have at least something resembling the release that she needed. Having her shuddering in his arms would be sufficient for now.
He moved to kiss her again, despite the tug on his hair from her fingers were curled tightly into his locks. He'd come this far, he might as well shag her, but Chas--whether she knew it or not--meant a lot more to him than might as well.