Vincent found it hilarious how determined she was that he was not going to win over her heart. It will be awkward in the future when he proves her to be wrong. With how easy it was to make her blush and fidget whenever he did the smallest thing, wooing her won't be too hard. He'll allow her to continue to think there was no way he'd charm her into being with him but then replay this moment in the future when they do get together. He desperately wanted to see her look of embarrassment and excuse in the future because of this moment.
"Whatever you say," he replied patiently, waiting for the future to come and surprise her. Aurora was much more stubborn in the past than she was now and they somehow fell in love with each other. He had no doubt they'll be together again. "Just prepare yourself for what I will do."