Shane didn't recognize Lotte. They'd never met face to face aside from him seeing her briefly around the building, and so all she was to him when he trotted up to her in the park was one more visitor in the crowd. She'd caught his eye mostly because of the way she was sitting apart from everyone, which seemed to be his modus operandi for the day.
She looked distant, sitting there by herself. It couldn't hurt to approach her, really. So he darted under the bench, coming out from underneath it beside her, but not too close for comfort. He played innocent, panting a little, and looked from her to her ice cream.