He knew he was grinning like an idiot when she gave in, but he couldn't help himself. He didn't pull his hand away though, instead he teased the soft skin beneath his fingers. Stepping a little closer so if anyone was looking they'd have to really really look to see what he was doing. "Good, because if you're good, I get to be bad." Shifting his hand a little he caught the nub that had hardened against his palm, and gently massaged it. Part of him wanted to drop down and tease her through her shirt, with tooth and tongue, but he resisted.
Dean did like pressing boundries, sometimes, though. He dipped his head so that his lips were just a fraction away from hers. Her eyes giving her away. "I'll make it worth the wait. Don't worry. And maybe a little taste right here." His fingertips eased from her breast, moving south, over her cool skin. To the top of her pants. Shifting a little closer, so that what he was doing was hidden by the door and his body, he thumbed the button open. Only to ease his hand inside. Over her panties, he very faintly teased his fingers lower still. Just skimming the thin fabric.
Only for them to pause, just a moment. "Don't, family's important. No matter how old it is." Dean whispered against her lips. His tone rough with lust. But still held conviction.