Obediently, as he tipped his head back with a low exhale, Will moved his hand from Tuck's arse to his hip, and found a way down inside the waistband. It was an awkward angle and he struggled a little, so he pushed the top of Tuck's pants down enough that he didn't have the restriction of the elastic in order to brush his fingers down the side of Tuck's shaft. "Hard already," he commented, even as Tuck's hand on him was achieving that same result.