The succubus pulls her dripping fingers away, clearly looking pleased, at the elf's response, trailing them over her belly, leaving trails of liquid over her skin. "Mmm, how was that?" she asks, teasingly. "Do you enjoy being that sensitive, then? Oooh, let me do a little work on your ears, as well," she says, reaching up with both hands, her breasts dangling close to ruby's face, as she slowly, carefully, elongates them, just a bit, making them a bit more sensitive; not nearly as much as the other change, but certainly more sensitive than they already were. "There. Now, I'm all done with the major work," she says, if Ruby likes the sensitivity level; otherwise, she'll slide her finger back in and adjust it again, not teasing her enough to get her to cum, again, likely, but certainly teasing her. "Is there anything you might want... added? A tail, horns, wings, maybe give you something you can use to fuck women like a man does?" she asks, giggling. "I love working with a body like yours... it's like a blank canvas, just full of possibilities. I can even do some quite advanced things, such as make you breathe fire, or make you immune to poisons and diseases, but those are a bit out of your mistress' budget, for this encounter."