You say "Yes", but Stacey has other plans.

Olivia stood up and looked down on the two of you, smiling coldly. You, still a woman with huge tits, breeding hips and a six-inch cock hanging between your legs, threw yourself at her feet. "I would love to be your fuckpet," you said. "Make me your cumdumpster and flood my pussy every day. I would want nothing more." Olivia slapped you across the face with her hardening cock. "Thank you, pet." You squealed in shock, then gave her bulbous head a kiss. Her cock began to harden again, but she shooed you away before you could begin sucking in earnest. "And what about you, Stacey?" Olivia asked.

Stacey sat up from where she lay on the floor, her belly distended with cum and pee, her pussy practically gushing, her face red, her expression strained, the picture of humiliation and defeat, and she grit her teeth. "Never. I'd make you my toy before I submitted to you, you mind-**** bitch. I can't believe I ever thought of you as my friend." Olivia sneered. "Fine then, two can play it that game." She gestured to you. "Pet, go get dressed." You nodded, then began to head to your room. "Actually," you paused. "Mistress, none of my clothes will fit." Olivia nodded. "Well, that is a difficult problem." Then she looked down, saw the marker lying on the floor, and slapped her forehead. "Actually, wait, no it isn't. Silly me, I'm magic." She grabbed the marker and wrote something on my navel. "No one notices that Fiona is naked, or thinks anything odd about it."

Then, after inspecting me, she amended it, writing, "Stacey and Olivia do notice." Then she turned to Stacey. "Go get dressed," she ordered, her voice taking on the air of magical command once more. Stacey struggled up to her feet and slowly began heading to her room, grasping her swollen belly. Olivia gestured for her to go help her. You did.

Soon, you were ready for your outing, with Stacey dressed in sweatpants and a baggy shirt, while Olivia dressed in a casual skirt and a top that concealed much of her belly while the low neckline emphasized her cleavage. Then Olivia grabbed her purse and held open the door for you two. You and Stacey had **** but to pass by her, walking out into the hallway.

Even though the marker, currently sticking out of Olivia's cleavage, was protecting you, your heart thundered each time you passed someone in the hallway. Your nipples rapidly grew to rock hardness even as your pussy dripped onto the carpet each time someone passed by you without so much as a glance at your naked body. You slowly began to become aroused by the emptiness of their looks, glorying in the secret that you shared with Stacey and Mistress. From the halls of your apartment building to the streets below, you grew bolder and bolder, approaching strangers with questions or shaking your ass or chest. You found that they would stare if you acted sexually, but if you did not, they didn't pay you any more attention than they did Stacey or Olivia.

Finally, you reached your destination, the park. From there, Olivia removed something from her purse. It was a collar, with a hook to attach a rope. She gestured to you. "Fiona, come here." You did, and Olivia wrapped the collar around your neck, then produced a leash from the same bag. She sattached it to the collar and then wrote on you with the marker, "People besides Stacey and Olivia think Fiona is a dog." She then wrote, "Tough, unbruisable skin" and "Can walk on all fours without discomfort". Then she directed you to get down on your hands and knees. "Come, Stacey," she said, offering her hand to your girlfriend. "It's a lovely day for a walk." Stacey tried to refuse her, but Olivia just glared. "Don't make me command you." Stacey finally did, once Olivia stowed the marker in her purse.

Then you began the walk through the park. You found walking on all fours to be quite pleasurable with the marker's assistance, and with its protection, you were granted a unique opportunity. Pedestrians would occasionally stop and comment on Olivia's "dog", asking what breed she or he was. Olivia always responded with a different answer and asked if they wanted to pet her. They often did, and many people stroked your cheeks or rubbed your head. The best interaction came when you passed by a group of kids playing soccer. They all ran over and asked if they could pet the dog. Olivia agreed, after making them promise to be gentle.

You let them rub you all over, then rolled over and presented your belly. They rubbed it eagerly, a few even accidentally hitting your tits. "Your dog sure is fat, Miss." One of the little girls commented. Olivia nodded, dropping down to grope you. "I know. I'm going to put her on a diet soon." Listening to her say something so casual while feeling you up, it brought you back to peak arousal, your cock hardening. At the sight of it, Olivia shooed the children away and produced the marker. "You're a bitch, Fiona. My bitch. You don't need that." She crossed out "Six Inch Penis" and your male genitalia disappeared, leaving you with only a greedy pussy.

After that you walked a bit more, till you reached a shady stretch where the walking path was lined by trees and flanked on one side by thick foliage. Few people, except the occasional jogger or byclist came through this part of the park. Finally, here, Olivia stopped next to a small sign that helpfully reminded park-goers not to litter. She tied your leash up to the pole and then turned to Stacey. "Alright, it's time now." Olivia said. Stacey sniffed, trying to look strong. She mostly failed, but her expression still managed the semblance of strength. "Time for what?" Olivia smiled back, her white teeth shining brilliantly. "Why, it's time for you to fall."

She then produced another collar and leash from her purse. "Be my toy, and let me fuck you. Totally and without restraint. I know that's what you want. Fiona told me that she made you into a living sex toy, just for her cock. You just want to be used, to drown in pleasure. Let me give you that. All I need you to do is one simple thing."

Stacey glanced around, then looked at her. "What, do you want?" Olivia flashed her teeth in something that wasn't quite a smile. "Go the bathroom, right here." She gestured to the trees above us and the bushes surrounding us. "No one's around. If you hurry, no one will see." Stacey trembled a bit. Then she slowly sank down into a crouch, pulling her sweatpants down to her ankles. Her panties followed, until she was squatting there, leaning forward, squeezing hard. As she did, her stomach gurgled.

"I, I, I hate this!" She cried. Then her expression suddenly shifted from pained and twisted to pleased, then her eyes flew up and she gasped, her face molded into an orgasmic expression. Stacey suddenly shit, a wave of fluid spraying out of her ass, splattering the grass, her panties, pants and everything around her. Stacey collapsed forward onto the ground, tears pooling in the corners of her eyes. She gasped, sighing with relief. "Oh god, thank you," she muttered.

Olivia walked around, circling Stacey to inspect her pussy. "Wow, that's really nice looking. I wish I could fuck it. Alas, you're all dirty." She sighed, disappointed. Immediately, you sat up. Mistress was having a problem. You needed to help. Luckily, you knew just what to do. You took off your collar- it was designed for a dog, so it was easy to take off with thumbs, and slid over to Olivia's purse. You fished out the marker and walked over to Stacey. "Don't worry, Mistress. I can fix that." You leaned down and scribbled, "Clean" on Stacey's arm. Olivia saw what you were doing. "Fiona-" she began. But it was too late. Stacey leaped up, her body clean, her clothes still filthy. "At last!"

She grabbed the marker from you and wrote on herself, "FREE". "Give me the Marker!" Olivia ordered. But her hypnotic commands meant nothing to Stacey now. Stacey wrote, "Telekinetic" on herself, and all at once, Olivia froze, unable to move, her mouth clamped shut. Stacey tossed off her clothes and using her power, scraped off what little filth there was on her body. Then she walked over to Olivia. "No, I'm not going to give you the marker. In fact, I'm going to make sure you can never use it again."

She quickly wrote, "Clean" on Olivia. Olivia's writings vanished, and she returned to her normal self. She didn't really look different, except for the slight bulge under her skirt was gone. But you noticed an immediate difference. Now the urge to help Olivia was slightly less. But you were still her pet. "Stacey?" You called. "Quiet," Stacey ordered. Her voice was angry, so full of rage that you dared not move from where you stood.

Stacey checked on you, then seeing you weren't going to move, turned back to Olivia. "I think all that stuff you said about wanting to be a fucktoy, about being used and feeling nothing but pleasure. I think they're true. But not for me. I think that might be what you want. So here's what's going to happen. I'm going to give you exactly what you want."

Stacey then wrote two words on herself, "Pyrokinetic" and "Teleporter". She grabbed her soiled clothes and caused them to levitate up into the air, before burning them to cinders with her mind. She then used her telekinesis to gather up her waste and the ashes and made them float in the iar. She then dug a hole, buried the remains, and covered it with earth. Finally, she used her telekinesis to move Olivia over to you. Touching the both of you, you vanished and reappeared in the living room.

Once there, Stacey turned to Olivia. She quickly wrote, "Living Sex Doll" on Olivia, causing her flesh to transform into plasticy substance. "Elastic Flesh and Holes" turned her skin to a translucent green. "Double-Sided" caused a channel to open from her pussy to her mouth. "Orgasms when Someone Cums Inside", "Self-Cleaning", "Self-Repairing" and "Evaporating all Cum in Contact with Her Skin after 10 Minutes" didn't change her in any noticeable way. Finally, Stacey added, "Feels whatever Sensation Finn or Stacey feel during Sex". Then, after a second thought, added, "Detachable head and limbs".

Stacey then turned to me. "Now, let's get to you. She walked up to me and crossed out, "Olivia's Fuckpet". Then she wrote, "Six Inch Cock" and "As Horny as I am right now" on me. Instantly, a cock grew between my legs, then hardened to adamantine durability. You grab her. "Stacey, I'm so sorry," you say, tears running down your face. "I had no idea- she **** me to," Stacey kisses you, hard. Then, scribbling "Elastic Holes" and "Orgasms when Finn cums inside" on herself, she tosses the marker aside. "Not now" she commands. Using her telekinesis, she grabs you and levitates the pair of you into the bedroom. She flops down onto the bed and you land at the foot of the bed, on your knees.

Stacey then spreads her legs, revealing a sopping wet pussy. Grabbing her pussy lips, she spreads them wide, showing you her glistening wetness. "Please," she begs. You lose control at that point. You were as aroused as Stacey right now, and all you could imagine was how good that would feel. So you plunged forward, driving yourself in as far as you could go. Stacey clung to your cock like a survivor of a shipwreck clings to driftwood, wrapping her legs around you as you pierce her from above. You slam into her over and over, your cock stabbing her over and over. Her insides suck you in, the heat from her core feeling like it would burn you cock. You howl at the sensation, screaming as you pound her harder than you might have ever. She begs and screams and finally, she drags you over the edge.

You're not sure who orgasms first, but it hardly matters. The marker drags you both down into a sea of pleasure, exploding inside and gobbling down each other. You float there, together, for what seems like an age. "Finn," Stacey says, reaching up to stroke your face. "Stacey," you say, pushing your face closer so you can kiss her. You stay joined together, embracing each other and feeling each other's warmth for a long time.