Inexperienced or not, Lilith groaned around his shaft as she drank down every immense spurt of his cum as if it were her last, sucking him to the base so as not to miss anything he had to give her.  She slowly pulled her tongue out of his cock when his balls had emptied their load into her gullet, and she popped free of him a moment later, flushed but grinning as she licked her lips of anything she might have missed.  Licking him clean just to be thorough and to get him hard again, she gave him another dose of her venom right through the opening of his penis, her fang entering his jap's eye without a problem as she pumped more of her venom into his shriveled balls directly.  They would soon fill again, although it would tax Labby's strength, demonic born perhaps, but the extra sperm had to come from somewhere.  He'd live while so many she had done this to had wound up as decorations on her walls in Labyrinth's chambers.  Letting him go once he was hard as a rock again, she crawled slowly up the demon's chest, her lips trailing their way up his flesh until her dripping sex was pressed up against his hard member once more.  "Are you ready?  You might feel a little weaker, but your arousal while already high, will be higher yet because of what I pumped into your testicles directly.  It's a side effect of my venom.  Your balls had been drained, I simply forced them to refill, but doing so like that takes away from your muscles.  You'll survive however, but so many others I've done that to, well, just look at the walls of this chamber."  She purred into his ear, her breasts pressed pleasantly against his chest as she reached back and took him in hand again as she sat up so she could see his face.  Breaking in virgins was a rare treat for someone like her, so she always savored the expressions of absolute bliss that crossed their features, male and female alike.  "Set the pace."  Was all she told him as she plunged his shaft deep into her core, making the succubus groan as he filled her so wonderfully.