Lean into his perversion

Mark moved one hand slowly and shakily as he felt his sister bobbing up and down his throbbing shaft. She seemed to be struggling to get more than about half of it in and looking down at her perverted adoration was almost enough to get him to nut right then and there.

Jill was thoroughly enjoying herself her free hand slipped inside her panties the only remaining item of clothing she wore that strained against her titanic ass. She was his canvas and he was a painter he would make her a work of art. Slowly and methodically he encouraged Jill to swallow more of his shaft she looked quite hot with that wolf cut,

He might as well complete her look.

Jill dresses and acts like a stereotypical slutty goth girl. She has tattoos and piercings that she designed and chose herself that help maximise her sexual pleasure and reveal her deepest fantasies. He typed in between stumbling awkward thrusts.

He leaned back a little as he put through the instruction, knowing that both of them would be fully aware of the transformation. His little sister looked up at him with a sense of deviant delight her hair did a great job of framing her curvy body and before marks eyes he could see a change in her. The first thing was the feeling of something cold and metal rubbing on the underside of his shaft, A new tongue piercing that was perfectly designed to contrast the warmth of her tongue and the cold of the metal.

The changes spread out over her face the modest make up turning pale and her eyelashes long as she continued to languidly lick her brothers forbidden phallus. I dainty hand reached up to cup his balls growing long, delicate sable black nails as she caressed his delicate parts. Spiderweb like lines drifted down her back and across her belly and thorny roses twisted across her arms, initially they looked harmless but the patterns changed shifting along her rippling back. What looked like roses from a distance mark recognised as images of his sister on her back images of her eagerly taking his cock, images of gang bangs and orgies yet to come all enticing him to get harder. Things yet to come, images of her with him, with their parents with his other sister working abroad. It was like a mirror of his own twisted desires.

Even her modest panties had changed turning the colour of India ink as they slid away from her body modest panties were no longer think she could wear and in fact this particular little number didn't even have a crotch perfect for the intimate incestuous access they both desired more than anything.

She lifted her head smirking confidently in a way he hadn't seen before as she delicately but firmly encouraged him to thrust into her ebony lips.

Jill was really getting further than he expected the will ring lines all the way up to 2/3 of his massive member and quite honestly he wasn't going to be able to hold out much longer he gave up trying to type anything else grasping his sister by her long black hair and thrusting deeper pushing his that shaft all the way down her throat. She gagged a little tears ruining her midnight make up before he relented and allowed her to move at her own pace she looked like something out of his most explicit videos a perfect pornographic fantasy just waiting to be fulfilled.

With a sudden grunt Mark pushed his cock is hard as he could stuffing as much down her throat as he started to spray before pulling back and showering her face and chest with more of his Bacchanal baby batter.

He lay back in his chair panting as he watched this creature of pure sexuality gently move herself into his lap.

"You butthead, look what you did to my body, I guess I've got to punish you now," she said in a voice that dripped pure lust.