With Sarah and Sammy both spent, and with you still able to keep going after just a momentary rest, you find yourself in a bit of a predicament. You sigh and pick up Sarah and put her on. As you place your tits inside of her cups, a slight shiver runs through you due to their current heightened sensitivity. The same with your cock, which Sarah of course has pressed firmly up against your torso and cleavage as usual.
You squat and kiss Sammy who offers to suck your dick and balls for a while once she recovers her stamina. You smile and rub your sack against her face teasingly before standing up and putting on a pair of high heel sandals and a skirt. Since Sarah technically is functioning as your bra as well, you do not see a reason to put a top on. Of course, you never even consider the fact that you are literally caked in the combined cum of 3 people right now and leave your bed room.
Walking down the hallway, you can audibly hear the litteral gallons of cum sloshing around inside both your own and Sarah's body. You make a quick stop in the bathroom though and empty out Sarah into the tub since you will be needing her storage space.
You are hungry and head out to hit up the nearby convenient store that is just down a few blocks. It is still late at night, so hardly anyone is around outside. But still, those who do pass by you and those who even just notice you all give you prolonged stares. And of course, why wouldn't they? You are super hot. In your head, you can't even think of the more obvious reason of the fact that you are leaving a trail of gooey cum in your wake as it slowly continues to drip off of the two of you.
A woman who isn't paying attention bumps right into you and drops her phone. She is about to tell you off when finally she looks at you and falls instantly silent as her face flushes red. In her mind, she has completely fallen for you. It is love at first sight. Due to this however, she's now won herself a free transformation.
Without breaking eye contact with you, she backs away into the street where she then drops down onto her hands and knees after stripping away all but her black, skin tight, thigh high, high heeled boots. You watch as her hands meld together and form a black mass that quickly begins to expand. A similar thing happens to her feet, however this time it appears around some kind of metal dowel that is wedged into the crotch of her boots. The two black masses continue to grow until they turn into 2 tires.
Her digestive system starts changing. Her stomach becomes a fuel tank and her intestines become an internal muffler. Finally her asshole gapes and a metal pipe pushes out of it, becoming her exhaust pipe.
Her spine bends backwards into a slight arc, sticking her ass up high as it swells up in size a bit, gaining tail lights in the process. Her pussy widens and wraps a good amount around her rear tire as her clitoris grows significantly longer and hardens, becoming her kick stand.
Her breasts push in between her arms and jut out forwards, causing her arms to bend at the elbows to go underneath them. Her nipples disappeared as her areolas become clear as a pair of headlights now occupy their insides. Her face tilts up to look straight ahead and her ears push out, becoming handlebars as a glass screen pushes up out of where her headband once was.
Lastly, her spine recedes into a deep u shaped channel that runs the full length of her back. And where her neck is, a second pussy forms. The majority of her body solidifies, keeping her human appearance, but now is able to be used and riden.
You grin and approach the new bike-girl as she turns her front wheel, moving her entire head to look at you. Her face brightens into a smile and her headlights turn on.
"Hello! Um, uh... look, can you... Uh, well. Please, could you be my rider? I will be a good bike. And I can even drive all by myself for you too." Suddenly she begs. Seeing as how it is beyond obvious that she is very much into you, you have no reason not to oblige her offer and accept by getting on her. You can hear and feel her hum with excitement as you lower yourself down onto her back.
Some how Sarah's body knew enough to release your cock, allowing it to fall out of your cleavage and land inside her back channel. You slide a bit forwards, inserting the tip of your dick into her neck pussy which causes her to moan loudly, and you feel her clamp down on your dick, securing it in place. You lean forwards and grab her handle bars and lift your heels up off of the ground, holding them tight against her ass and thighs.
The bike-girl lifts her clit off the ground and takes off quickly. Her long black hair, while whipping around behind her, never inconveniences or even touches you somehow.
"So like, what's your name?" You ask.
"My name is Morgana. Oh, but please rename me if you want to! I will gladly accept whatever you choose! I also need to know where I am bringing you to Mistress." Quickly replies Morgana. You have no issue with her name, and her complete and utter submissive mindset is rather cute in your opinion.
Sarah just rolls her eyes and begins moving her straps around slightly, giving your tits a playful massage, which in turn, makes you also start moaning quietly.
"You can bring us to the store down the road Morgana. Also, my name is Sarah, and you should know that I am the First Wife." Says Sarah in your place since you can't stop moaning from her amazing breast massage. You find it adorable how Sarah is making sure her position in the harem is known. But it seems it is pointless for her to worry about Morgana.
"Oh! I deeply apologize Miss Sarah. I promise I won't aim to take your spot. I am just a horny bike-girl after all. Just being used is more than enough for me."
You definitely heard her slip the word horny into her apology, but can't do anything but moan as Sarah is being relentless with your tits. You haven't even opened your eyes in some time now, letting Morgana handle all the steering completely on her own.
A few minutes pass and finally you reach the store. You also have cum twice now from not only Sarah, but even Morgana pleasuring you. Morgana seems to be able to control her cock channel and has been essentially jerking you off this entire time. This is a good thing though, because according to Morgana, she runs exclusively off of using cum as her fuel.
Now that you are at the store, you sit up and get off of Morgana. Sarah rewraps your dick with her straps at the same time. Then to both of your surprise, Morgana stands up on her rear wheel and splits it in half down the center. Her front tire lowers down in front of here as if she was just holding her hands together. Her 2 tire feet begin to roll after you, as she follows you eagerly. She also turns off her headlights, which interestingly makes the clear parts turn to her normal skin color. Her areolas and nipples don't though, leaving her with a Barbie doll-like pair of boobs. Her body also regains its flexibility and her massive pussy tire well turns up as she sets her hand tire down in it. Her arms break off of either side as her hands return, leaving the tire to rest inside her pussy tire well.
You and Sarah are kind of at a loss for words as Morgana fixes her hair as her handle bars reshape into interestingly, a pair of long tipped elf ears that stick out to the sides of her head. She happily leaps onto you and hugs both you and Sarah. After that, she wheels herself back a bit and just waits to follow you around.
You shrug and grab her hand and walk into the store together. Thanks to her speed while she was driving you and Sarah, all the left over cum you both had on you has been blown off too. At first Morgana stumbles a few steps, not expecting you to pull her hand, but recovers and rolls herself just fast enough to match your pace.
The two of you begin loading up Sarah's boobs with snacks, leaving her pussy for the to handle the softer foods like fruits and vegetables. You check out and Sarah even pulls out your bank card from the back of her mouth for you to use to pay with. You laugh at this, finally knowing what happened to your wallet, pay, and return the card to her mouth which she pulls back inside herself.
Morgana even takes a few things out of Sarah's pussy and puts them into her own ass which has apparently been turned into her storage place. Her's is much more sleek than Sarah's is too. All she had to do was give her ass a poke and a panel pushed out and up as the top part of her asscheeks moved out of the way, giving access to her booty bin. She already has a gorgeous ass to begin with, and now you know why it is so large. Once everything is stored inside, she taps the panel again and it closes, returning her ass to its prior appearance seamlessly. It is also amazing that once closed, her skin now bends and moves as if there isn't a hidden panel there at all. Once outside the store, Morgana returns to her bike form and takes you back to your home, where she changes forms once again and follows you inside.