Pleasurable

Knowing that the building was full of your brethren and that your captive's younger sister was too terrified to run, you decided its best to take your time with the eldest. A low groan slid from the girl's lips as you tirelessly slide your tail-cock between her dewy folds. Bringing a taloned finger forward you slide it beneath her chin before easing her eyes up to your own.

A satisfied smirk runs across your pitch fang-tipped lips on seeing her former baby blues slowly becoming tinged with crimson flecks. Wanting to increase the girl's pleasure you wrap both taloned hands around her waist and ease her onto all fours. Once in the optimum position, you thrust your steely cock forward in one brisk motion up the girl's virgin arsehole.

The low moan is quickly replaced by a guttural scream as you savagely piston in and out of the gaping hole. A feral snarl escapes your lips as you feel the hole begin to tighten and swell upon your twitching member. Glancing down you watch as her formerly flat rear, balloons outward into a pert bubble butt. With each thrust you watch her plump cheeks jostle enticingly.

You continue your animalistic rut, every so often glancing down to eye the other not-so-subtle changes that were taking place. One such change were the girl's breasts which had inflated from a B-Cup to a set of DD's that rode high on her chest. Your slit eyes darted down as you watched her erect nipples slide along the floor and coax a fresh stream of tainted milk from within.

Cum oozed out from the girl's bulbous cheeks as she threw her head back and released a wanton snarl from between her voluptuous fang-tipped smile. Her slit eyes locked onto yours as her former brunette locks were subdued by a swathe of inky black. Knowing the girl was nearing the end of her transformation you remove your tail from her slick lips and replace it with your cock.

The newly minted Succubus purrs lustfully as two ram-like horns push out from her forehead and two leathery bat-like wings burst forth from her blemish-free back. A low scream emanates from the right as you turn to see the younger sister completely distraught by the elder's corruption. Snarling you push the horny demonic slut off of your cock and coat her fiery flesh with your corruptive ichor.

Grinning the newborn eases herself up onto her taloned feet, her cock tipped tail whipped out from between her plump cheeks. Dropping you a feral grin she effortlessly raised it to her pillowly lips before taking a quick shot of her own cum. As the tail fell away from her grip another steam of cum coated the floor beneath her talons.

The newborn Succubus revelled in her newly corruptive form as she sidled up beside you. As her serpentine tongue laps against the nape of your neck, she mewls in a husky tone; "Mmmmm, thanks for the ride stud." You merely grin and slap her on the arse. A low purr flows from her seductive lips before she continues; "I'm Natalie, my soon-to-be Succubi sister is Amelia."

Amelia looks beside herself as Natalie begins to stalk towards her with you following closely behind...