“I want to see if I can improve on the powers that can be passed on to me. In addition I’m hoping to be able to eliminate some of the weaknesses you succubi and incubi might possess. Aversions to holy symbols, direct sunlight, pure metals, prayer, that sort of thing. No offence,” she finishes at the look of insult in your eyes. “I’m sure it’s great being a demon, but that’s my scientific mind for you, always looking for a better way of doing things.”
“Alright,” you shrug. “I can handle that, I guess.”
“Maybe you’ll find a way to improve on others like us after your experiment on yourself,” Becky offers.
“Quite likely,” Rachel replies. “Let’s get started. I can’t wait any longer. Just having you two in the doorway is making me hornier than I’ve ever been before.” She reaches out and finds an empty beaker among the clutter on her desk. “I need a sample of cum and saliva, from both of you. I’d take it myself, but I don’t want to risk getting infected prematurely, if you know what I mean.”
You and Becky both nod your understanding. She pushes past you into the room and crawls onto the bed, sticking her fantastic demon butt up in the air and looking back over her shoulder at you. “Well, you heard her,” she barks. “She needs a sample of my cum. Come and make it happen.”
Spurred on by your protégé’s audacity, you spring lightly onto the bed and ram you huge red cock right up into her swollen hole. She moans with pleasure and starts sliding forward and back, impaling herself over and over on your dick. You reach under her with your tail and massage her clit with the tip, hands finding her hips and guiding her ass as it moves. “Oh yes!” Becky sighs seductively. “Fuck me master, fuck me harder. You’re going to have me cumming in no time.”
“Fuck that’s hot!” exclaims Rachel, pure lust in her eyes as she watches the two of you. She can’t resist pulling down her thong and slipping a finger inside herself as you respond to Becky’s urges and pick up the pace. Just as you feel her pussy begin to clamp around you in the beginnings of her orgasm, you thrust a pair of fingers into the bud of her ass, up to the second knuckle. Instantly her orgasm arrives, intense and loud, her wordless screams reverberating around the small room.
As the succubus writhes in pleasure beneath you, you glance over at Rachel. The fever pitch of demon sex in the room has her cumming already, her fingers slick with her juices and moving effortlessly in and around her mortal genitals. Her eyes are shut tight, but you know she is still picturing you and Becky as she enjoys what will probably be her last orgasm as a human. That thought brings a smile to your lips. Then you feel Becky’s lips upon you and your smile turns into a smirk of fiendish horniness. She effortlessly engulfs your member with her mouth and throat, savouring her demon cum in her mouth even as she deepthroats you. Withdrawing to the crown of your cock, she wraps both hands around the lower section and begins bobbing her head on the top. The sucking and the jacking are in perfect synchronisation and it isn’t long before your own roar of orgasm echoes in the science student’s bedroom.
Taking your entire infectious load without blinking, Becky picks the empty beaker up off the desk and slowly spits her mouthful into it. She even manages to make this sexy, and despite your wish to take Rachel next your desire to fuck Becky again so soon after doing so twitches. You content yourself with worming your tail into her ass as you take the beaker from her and spit into it yourself. Becky responds in kind as she takes back the beaker and hands in to a slightly recovered Rachel.
“Perfect,” the blonde student says, eyeing the beaker’s contents with unashamed yearning. She swings her chair back to the desk and selects a pair of test-tubes, emptying their contents into the beaker and stirring with a glass rod. The creamy mess turns pink in colour as she does so and she smiles at her success. She then proceeds to set up a distillation of the beaker’s contents. “This shouldn’t take too long,” she tells you.
It takes longer that you are prepared to wait idly for, however, and you end up switching your tail for your cock in Becky’s ass, this time cumming deep inside her when your time comes. Rachel, distracted by the experiment on her desk, pays no attention. Finished with Becky, you see that the results of the distillation are beginning to come to light. Red liquid is dripping into the test-tube at the end of the apparatus and Rachel is obviously pleased by this outcome.
When the test-tube is three-quarters filled, she shuts off the gas and tips the red liquid into a mostly full beaker of clear, bubbly liquid. “Lemonade,” she explains. “I’ve always had a sweet tooth.” With a triumphal flourish, she downs the vessel in one go. You and Becky look on expectantly. |