Beth, the pretty redhead.

Ever since she started working here you've dreamed of what might lie under her quirky, cute clothes. You stride over, barely noticing Karen and Alex make their way towards Theresa.
"So." You say. "Why have you chosen to join us so readily Beth? It is an admirable choice I must add."
As you approached she had lowered her hand and stared off into space. Now, she looks up at you, tears forming in her eyes. Her voice trembles as she says; "I wanted to... to help. Let the others escape... Oh god." She buries her face in her hands, the tears now streaming down her cheeks. "What will Tony say..." You vaguely remember that Tony is her boy friend. You approach and crouch down to her height. Gently, you pull her arms apart and lift up her chin to meet her eyes.
"Don't worry." You say, as kindly as you can. "We're only going to do whats best for you." And you mean it.
She suppresses her final sob and says; "You mean it? You'll... let me go?"
You shake your head and smile, like a teacher to a troubled student. Before she can fully grasp the meaning of your response, you press your lips to hers, pushing your tongue into her mouth. You quest about her tongue, and she tries to pull back. You press yourself into her. You feel her soft labia through your trousers and her small, firm breasts against your chest. You pull her closer, pressing her hard against you, lifting her from the chair, always arresting and teasing with your long tongue in her warm, moist mouth. You pull free, and look down at her. Her face is still wet but she seems to have stopped crying. You'll change all that soon. With one hand still wrapped around her waist, you undo your pants and let them drop to the floor. Then, you rest Beth so she sits on your erect penis, like a bike saddle, the thin fabric of her underwear the only thing separating your genitals. This has the intended effect. With a heavy sob the tears begin to roll again, but this time she keeps eye contact. You lean in close to her ear and whisper ever so softly; "You will only have it when you want it. But you will want it, I'll make sure of that." You look back at her and grin. The mere fact that you can have all her weight sitting on your cock has you aroused already. But there is one thing stronger than lust you feel now. You look down at Beth's pale, freckled neck. You can hear the throbbing of her artery, see that her heart is beating fast, about to break.
"Oh little doe." You mutter. "Are you ready?" Her eyes fill with fear and panic, she squirms against you trying to get away.
"No!" But its already too late. You plunge your bared fangs deep into her neck, the cry dying in her throat. You drink deeply, the warm blood rushing through your body fills you with ecstasy and strength. The sweet taste pervades every fibre of your being. You waste not a drop. When you taste no more, you pull her in close and allow yourself to lie on the floor, the rapidly transforming nymph resting peacefully on your chest. You look up to see Karen's mouth clamped onto Theresa's naked thigh as Alex drains her neck from behind. The woman quivers in orgasm. You feel something brush your penis and look down to see Beth sizing up your member.
"Do you want it?" You say seriously, but make no move to stop her. She turns around, a lustful smile on her lips.
"More than anything." She straightens up and slides onto your cock. Her vampire pussy is slick and grips your length nicely. You gesture to her dress.
"Show me." She looks down then, pulls of her dress, tossing it aside and posing seductively. She is still wearing her soaked panties, she has merely pushed the thin fabric aside to allow your penis entry to her perfect vulva. She was never wearing a bra it would seem, as you see her breasts bare before you. They are larger and rounder, but not so much bigger as to disrupt the perfect balance of her slender form. Her flat arse is now nicely rounded, the firm buttocks pressing pleasingly into your thighs. Her sky blue eyes glow brightly over her deadly fangs. Her muscular body is still caked in freckles. You nod with approval.
"It is yours." She leans forwards, palms on your stomach, biceps pressing her breasts together, and begins to lower and raise herself on your shaft. After a few bobs she begins to pick up the pace. The movement would have been hard to maintain before, but with her now ultra athletic body she completes it with ease. Her neck arches up, eyes closed in ecstasy, mouth agape. Then, always increasing the pace, she straightens up and places a finger on her clit, which has the dual purpose of stimulating your penis as it moves within her. As she lowers and raises she also writhes from side to side, providing ever more stimulation to your cock and causing her tits to sway nicely. Before long, you feel yourself coming to climax, and you are sure she is too. You grab her by the waist, making sure to get a good handful of ass too, and begin to lift her up and down more vigorously, slamming her labia into your crotch time and time again. She puts her hands over yours and you can feel her giving as much as she's taking. She begins to moan loudly, and you let out a few grunts yourself. The crescendo is reached and you both come, hard. You thrust into her and grip her buttocks as she writhes, her hands questing all over her body, orgasm after orgasm sending shock waves through her flesh. You shoot load after load into her vagina, until eventually you settle, the cum dripping out of her wet cunt onto your still penetrating penis. She flops onto your chest, your penis finally sliding out of her delicious hole. She hugs you, smooshing her face into your collarbone, her red curls draping your neck. You wrap your strong arms around her as you both sigh with satisfaction. You look around you. Karen and Theresa are kissing passionately, with Alex's penis in between their squirming lips. Clarice is sitting with her back to a wall and has Evelyn's hair in her hands as the goth chick tongues her vulva happily. Her butt is thrust into the air, giving you a tantalising view of her clit ring jiggling with each thrust of her tongue. There are only vampires in the room, all the humans have gone.
"Well that's enough of that, don't you think?" A familiar, authoritative voice calls out. You stand, easily lifting Beth to her feet with you. The others respond likewise.
"Although I must say." She smiles her sultry smile. "It did look rather a lot of fun. However, duties still remain. As you can see." She gestures around the room. "I have let our esteemed colleagues go. Now its up to us to track them down and give them the best training possible." With that you and the other vampires laugh. Gwen puts her hands on her hips, a general commanding a fledgling army of the damned.
"Let's feed!"