The first day

Ariel's body changed in a swirl of heat and light. Her tail turned to legs and her body began to balloon. Some round squishy globes appeared on her back where her tail had been at the top of the new limbs she would need for walking. Her shell top popped of as the straps holding it broke under the weight of some massively expanded boobs. She could no longer breathe underwater and made her way to the surface with the help of her friends. Gasping for air she was pummeled by the waves she used to navigate so easily.

Ariel washed up on a beach she had never seen before. The bright sun was blinding, and she covered her face as she adjusted to her surroundings. Wobbling to her feet she held onto a rock for support. It took a moment, but she found there was strength in her legs. She went around the rock and tripped on a piece of driftwood. She wasn't used to tripping on things in the ocean. Ariel faceplanted in the sand. When she lifted her head up, determined to adjust to this world she was face to face with a giant, blue cock.

Ursula was standing in front of her, completely naked except for a black leather corset. She had big meaty thighs and titanic titties. Ariel's were in the G range, but Ursula's were off the charts. Her cock was over a foot long and thicker around than Ariel's wrist. It twitched in her face as she pushed herself up from the ground.

"…" Ariel had begun to ask a question, but she couldn't speak. She clutched her throat and then noticed the glowing shell necklace on Ursula.

"Don't forget our bargain little sea tramp." Ursula laughed. "Though I hope you remember the fine print."

Ariel's jaw dropped, and she shook her head no. Then she shrugged in a "I don't know what you're talking about." Kind of way.

"you must get Eric to kiss you by sundown on the third day or you will return to normal. Blah, blah blah. Legalese with terms and conditions. Etcetera, etcetera. And…I get to fuck you however I want every single day during this time. When I want, where I want. After I cum each day, you may resume your quest to earn his love." Ursula's grin was ear to ear.

Ariel's eyes started to fill with tears, but she wiped them away. She set her face in a scowl and crossed her arms over her exposed boobs. Her attitude said, go fuck yourself.

Ursula laughed again and tapped the glowing pendant around her neck. Oh sweetheart, don't fool yourself into thinking you have a choice. Struggling against herself, Ariel slowly leaned towards the veiny monstrosity with her tongue out. She threw her hands up and grabbed Ursula's thighs, trying to push herself away but her arms didn't have any strength. She swirled her tongue around the tip and then dragged it along the base of the shaft up to the base. With the giant cock sitting across her face she lapped at the underside of Ursula's cock causing the sensitive bundle of nerves at the base to go crazy. Ariel buried her face into Ursula's big blue balls, slurping and salivating all over them with a passionate tongue bath.

Ariel cupped the bull-sized testicles with one hand while stroking the giant she-dick with the other. She felt something behind them she didn't expect. There was a clit and a vagina. Ursula saw the confused look in her eyes. "Hahaha, I'm still every bit a woman, Ariel. This baby is just a magical toy. Real as can be, though temporary." She said thumping her thick rod against Ariel's face. "now, I'd like you to get serious about your duty. Wrap those nice jugs I've given you around my cock." Ariel did as she was bidden. "Oh Ariel, this would really go much better for you if your put your heart into this." Ursula said as she grabbed the back of Ariel's head and shoved her cock right in. She pumped her prodigious member in between Ariel's fun bags and slammed into the back of her mouth. "Seriously dear, if you could talk you would be thanking me. Eric is a prince, with prospects all across his kingdom. How do you expect to keep him interested if you haven't properly been trained in how to care for a cock?"

As soon as the giant blue dick gave her a moment of relief, Ariel expelled a giant wad of spit that had been building up onto Ursula's cock and started actually massaging it with her tits. She bobbed her head aggressively on the slippery wet dick while staring Ursula in the eye. Her look said, "Cum you fat bitch."

"you're not winning any love with that scowl sweetheart." Ursula mocked. An unnaturally large wave crashed into Ariel and knocked her to the ground. "Oh, you poor thing, did I do that?" Ursula's giant tits shook as she cackled. "Here let me help you up." She grabbed Ariel's hips from behind and with incredible strength lifted her off the ground. Ursula's cock sprung up between Ariel's legs and she sawed her cock back and forth on Ariel's crotch.

The heat and the friction of Ursula's veiny cock was making Ariel wet. Her juices coated the Sea Witch's pussy probe. Ariel swung her right arm behind her, but the magic of Ursula's enchantment caused her to slap her own bubble butt instead of hurting the blue-skinned bbw. "You don't have to ask me twice darling." Ursula said as she began her own spanking of the plump, white ass cheeks. They quickly became a rosy red color. Ariel braced herself against a large boulder as Ursula pressed the tip of her cock into her pussy.

Using Ariel's hair as a handle, Ursula pulled the succulent young bimbo backwards onto her cock. Ariel gritted her teeth as the massive member penetrated her. It was impossibly large and would have forced a stream of profanity if she only had a voice. Instead, only a sexual moan was able to escape. Once she was all the way in, Ursula pulled out and began to thrust back and forth into her redheaded cock sleeve.

In the distance Ariel heard a barking sound. "Here boy, Fetch!" Recognizing the voice, Ariel's heart sunk; Eric couldn't see her like this. He'd never love her.

"You lucked out sweetheart, it seems I'll have to wrap this up sooner than anticipated. I would have enjoyed a few more hours of fucking to be honest."

A rubbery red pearl bounced past the rock covering them and a shaggy four-legged creature bounded after it. Happily grabbing it's treasure it cocked its head at the two hoomans were mating on the beach. They looked hoomans, but they smelled like the big water. His instincts kicked in and he began his courtship dance on the submissive female's leg.

"Ha! Maybe one day mutt, but today she's mine." Urusula hoisted Ariel up and nested her in between her giant tits, never taking her cock out in the process. "Go play with your master boy, this bitch is mine." Max dutifully returned to Eric and the two continued to play fetch less than a hundred feet from the two busty women.

Ursula's massive blue balls slapped against Ariel's clit intensifying the pounding of the huge cock. She couldn't take it anymore. She came all over Ursula's thick blue rod. "I bet you're glad I've got your voice, aren't you? Otherwise your precious prince might hear you squealing like a pig right now." The cock onslaught didn't stop, and Ariel came again and again. Her eyes rolled upwards and her tongue lolled out as she panted heavily.

"Here max, let's go sit down and have our lunch. There's some shade over by that large rock."

Ursula brought Ariel down to the sand on the opposite side of the rock. The waves splashed on their feet. She shifted her great blue bonkers until they smothered Ariel's torso. Her head barely poked out from underneath the giant mammaries. Ursula's thrusts were deep and hard now. She buried herself to the hilt and held it before pulling out and slamming back in. "Do you know what's going to make me cum Ariel? Do you know what's about to send me over the edge?" she whispered in Ariel's ear. "Fucking you mere feet from where your precious prince is going to find you. Find you covered in my cum. Ariel shook her head from side to side with an expression of panic on her face. Ursula simply grinned and briefly took aim before unleashing a torrent of sticky blue cum all over Ariel. It filled her hair, coated her face and a puddle of it pooled on her stomach. It was sweet, like jelly. And Ursula chuckled quietly to herself as Ariel subconsciously licked it from her lips.

Ursula blew her a kiss, "see you tomorrow darling," and vanished into the ocean in as a splash of seafoam.