That was a dirty tactic, if Thor had ever seen one. He didn't like that. Well... ok, he did, and that was the problem. The featherlight touch across his stomach sent goosebumps up and down his arms, which would actually be visible to Diana with how close they were together. But to Thor's credit, he didn't let up on her. Instead, he pressed her in again, cocking his head slightly to one side as he took a step closer to apply more pressure. Neither would be hurt by the move and he knew it.
So why half-ass this if he didn't have to? With his arm firmly on her and his weight pitched forward, Thor took a half-step inward, bringing himself level with Diana's eyes. Then he smirked at her as he said, "I win, Diana."