Dawn makes another "Big" change to her appearence

Dawn sat there watching her big sister obsess over her best friend’s massive cock and slowly felt herself getting turned on again. She didn’t even notice Tara crawl up behind, lightly kissing Dawn’s neck and starting to play with her nipples. Faith already had one hand massaging her clit while the other began siding under Dawn’s ass. She felt her senses go into overload as the two older girls pleasured her, all the while keeping her eyes on her slut sister’s mouth sliding up and down Willow’s shaft. She watched Willow finally lose control and grab her best friend’s hair and start thrusting her freckled cock even deeper inside Buffy’s waiting and obedient mouth. Buffy moaned through the rough face-fucking and let Willow take the lead, keeping still while Willow used her as a cock sleeve. It was way too much for Dawn to handle, watching her big strong sister-turned-cock-addict getting dominated by Willow, at the same time being felt up by the other two horny girls. She need was **** to know what it felt like, she wanted more than anything to make her sister into her horny, willing, little bitch just like Willow had her now.
“Stop!” she said with her mouth and her mind.
The four women obeyed her will as Faith and Tara instantly released Dawn and Willow removed her cock from Buffy’s now drooling mouth. Dawn focused her thoughts on the incredibly hot fantasy she’s come up with in her head and suddenly, she could feel her powers once again making her will a reality and she watched as Willow’s cock disappeared restoring her ginger furred pussy to its original state. Willow looked down at her body, clearly a bit disappointed her new favorite toy had been taken away; Buffy on the other hand looked absolutely heartbroken. Dawn could still see the **** hunger in her sister’s eyes and smiled wickedly. Before Buffy or Willow could object, Dawn felt her groin changing and she eagerly looked down at herself to watch as her own very impressive cock began to grow where her pussy had been a second ago. All four girls and indeed Dawn as well watched mesmerized as her new dick continued to extend in size before them. Dawn had at first wanted it to be the exact same length as Willow’s but she began thinking about how easily Buffy managed to handle a piece of meat that size and how effortlessly Willow could side every inch past the slayer-slut’s ready and willing lips. She wanted to see Buffy pushed even further and as her arousal grew; her new erection grew with it until it was 13 inches long and very thick. Keeping her eyes on her sister, Dawn gently grabbed the base of her cock and slowly began to stoke it. She could see longing in Buffy’s eyes as she lay back on the bed and played with herself.
“Wow, it’s bigger than mine was, it’s a little scary.” said Willow in awe.
“Hey Buff, think it’s to big even for you?” asked Faith, reaching out and helping Dawn masturbate, gripping her hard shaft with a firm hand and running her fingers up and down its entire length.
Buffy seemed rooted in place, her eyes transfixed upon Dawn’s new appendage, her mouth hung open, tongue hanging out, saliva dripped off her lips from the **** Willow’s dick had inflicted. Dawn smiled and spread her legs for Buffy.
“Are you still hungry big sis?” Buffy nodded, gazing longingly at her sister’s massive rod, inside she could fee herself aching for it.
“God, B your such a cock whore! I love this!” Faith said as she watched Buffy and began to play with Tara’s nipples with one hand and finger herself with the other.
Dawn stood up and placed her hands on her hips. Like a trained pet, Buffy instinctively sat up, awaiting instructions.
“If your so horny and **** for your little sister’s big hard cock, then get down on all fours in front of me and beg for it bitch.”
Buffy pounced off the bed and landed on fours just as Dawn had ordered. She poked her head up, looking up into the nearly sex-crazed eyes of her dominant sister.
“Dawny, I’m your little bitch. I want your cock! I need it in my mouth! I need you to fuck my face and cum down my throat, please Dawn let me suck it!”
Dawn grabbed her sister’s hair just like she’d seen Willow do before, and thrust the head of her massive member into Buffy’s ready and waiting mouth. She threw her head back as she was overcome by the pleasure of receiving her first blow job felt Buffy’s lips take her throbbing erection. She very slowly pulled Buffy towards her by the hair, watching Buffy’s stretched mouth take the huge tool inch by inch, further and further past her lips. She watched, impressed, with her sister’s ability to handle a dick of that size. She moaned as she felt Buffy’s tongue dance around her invading monster, and yet Buffy didn’t resist, didn’t even gag and didn’t pull away as Dawn continued to **** herself deeper and deeper down Buffy’s throat. Finally, Dawn watched the last inch of her cock disappear into hungry sister’s gaping mouth. Buffy tightened her mouth around her sister’s cock and began to suck deeply, the sensation of her amazing oral skills was nearly too much for Dawn who grabbed her bed for support.
“Damn, she actually did it!” said Faith breathlessly.
For a moment, Dawn just stood there, taking in the raw pleasure of Buffy sucking her dick as we as the amazing sight of her big tough sister, the Slayer on the ground in front of her acting like a delusional whore. She wasn’t quite sure what she wanted to do next, should she let Buffy go to work pleasuring her as Willow did? Or did she want to really take control of her big sister and fuck that face until she covered her big sister in her cum? Or maybe there was another idea she hadn’t thought of yet.