Before he knows it, he's smiling smugly. Like when they first met in her shattered living room. When he could make her blush with just an expression of confidence. "I think you're unduly flustered, Master." He likes it when she's unduly flustered. "You let the last cup of tea I made you get cold--" He nods towards the nightstand. "So I'll stay here to make sure you drink this one. There's no reason to make a face like that about it."