Rachel ran out the door, flustered at almost being walked in on by her roommate during her frenzied masturbation session. Having not cum, she was still very horny and her thoughts kept drifting back to her initial hope that Helen might find the dildo and use it. Her pussy was still very aroused and as she walked her thighs rubbed it mercilessly.
"Fuckkk..." She half-moaned to herself, wishing she could have finished up with the dildo herself. She had been walking aimlessly around campus but at this moment had a sudden realization. It was Monday, and in her haze of lust she had walked so long she was almost late for her first class!
"Shit shit shit!" She said, taking off sprinting across the college grounds towards where her next class was. The butt-plug lodged firmly in her ass made it slightly uncomfortable to do so but she pushed through the discomfort.
Her next class was a four hour long chemistry lab. Luckily for her she didn't need any books for it besides her lab gear which was stored at the lab. As she arrived at the building, winded and bracing herself on her knees to recover for a moment, she glanced at her watch and noticed she had two minutes to spare.
She made her way to the room and got there just in time. After sitting down in her seat, the time just reached the hour and class had officially started. "Ok everybody, you should have been studying over the weekend, so good luck!" said her teacher as he started to walk around passing out the exams that they were doing instead of lab that day.
This had not been something Rachel had been prepared for. Given her strange and wild weekend, all memories of this test had been wiped from her mind. She stared at the test blankly as the teacher placed it in front of her. The words may as well have been written in a foreign language for all she knew. This test was just not happening today, she could already tell. With a resigned sigh, she picked out her pencil from her purse and started to at least try and tackle the multiple choice.
There was some she recognized from lecture. With any luck, she could half-ass the math questions and walk out with a D+ or maybe even a C. As she started to accept this possible outcome, she noticed her intense horniness that had gone down somewhat from the sprinting start to build again. It started in her vagina where there was a dull ache to be filled. Her thoughts turned to the dildo and how much she missed the fact that she hadn't been able to finish while using it. Her pace on the test slowed down and she started absentmindedly doodling on the paper while daydreaming about what she could do with that big cock she had left behind in her room. Or what Helen was up to right now...
It was then that she noticed something. There was a feeling coming from her vagina like it was scraping against the fabric of her jeans. But that wasn't right, she wasn't moving. It was a kind of nice feeling, having something run over her smooth bare lips as they moved across her jeans. For the life of her she didn't know what was happening but thought it almost felt like her pussy was being dragged backwards a bit, more towards her asshole. That had been feeling a little different too and was now throbbing and squeezing tightly on the butt plug lodged in her ass.
Shit! The butt plug! She was screwed now, her rapist's cum had been lodged in her ass for a few days now and he had said that was how long it had to remain there. Far from worrying her though, she was started to become excited to see what changes it would bring. Her more feminine figure and raspy new voice had been amazing gifts already, and whatever was happening to her pussy and asshole felt so good that she didn't really care, instead deciding to urge on the changes. Her slit readily agreed as it began to grow increasingly moist and leave a spot of wetness on the inside of her jeans.
"God I love having such a wet slit like a good little slut..." She thought to herself, not even caring anymore about how her thoughts sounded now. She started slowly rubbing her thighs together and trying to stimulate herself a little that way. Her attention shifted mostly to her pussy as she felt it change more, swelling and puffing up to rub on the inside of her jeans even more.
"Ohhh fuck yeah" she said under her breath, reaching a hand down to rest on her the inside of her thighs as she pretended to study her test closely. Her nipples were sharp enough to cut glass at the moment and she almost wished she was wearing something other than her sweatshirt so that the class could see her building horniness. The butt plug lodged in her ass was feeling better and better and she relished the thought of getting fucked while having it in her. The changes had not left her asshole alone either. She could now feel it pushing out further into her crack then before as it continued to throb.
Her eyes swept over the men in the room as she thought of all the ways they could fuck her, tie her up, use her any way they wanted to, any hole they wanted to. Her pussy had soaked the inside of her pants by now. She could feel it now, mostly changed. It was definitely wider and longer, as well as puffed out a bit. The hand on her thigh moved deftly into the inside of her pants to press on her pussy and play with it through the fabric.
She left out a soft moan as she pushed on her mound and started to knead around her clit. That felt larger too, about the size of a quarter now. She wondered just what had happened to her but loved it nonetheless. Her area felt so sensitive down there now and the cum inside her had corrupted her mind to demand more of the changes washing over her. The juices from her pussy were now leaving a wet spot on the seat as she rubbed and rubbed, quietly building up a fast pace as no one else seemed to notice. Not that she would mind at this pint. She thought about getting fucked, dominated, just ravaged completely by men, women, anything that was willing to fuck her. Her rubbing reached a feverish speed and she let a sharp "Ohhh!" as she came fast onto her seat, her puffed out pussy throbbing and her larger pucker throbbing around the butt plug.
"Is something the matter, Rachel?" Her teacher asked, having heard the noise. She was panting lightly, still recovering from her orgasm but had a response prepared. After a moment she said "Oh no, just figured out the answer to the last question!" while throwing her teacher a bright smile. She knew she had to find something or somebody to fuck properly and decided she was done with this stupid test. She got up from her seat and walked sensually over to her teacher to drop off her test, feeling her enlarged pussy lips sliding against each other with each step. A trickle of juices was making its way down the inside of her thigh and she felt the urge to stop and wipe it up and taste it, but decided against it for the moment.
As she left the room she decided to stop at the bathroom in the building and check to see what was the matter with her pussy, why it felt so different anyway. She made it to the restroom without incident and found an open stall. Since the lighting wasn't very good she decided to pull out her smartphone and try to see it with the flashlight, but couldn't see enough to know what was different, only that feeling it was darker looking. With her fingers she probed around it. They told her it was much meatier and fatter than before, with a stretched out shape to it and lots of moisture glistening around the lips.
It hit her that she could take a picture of it with her smartphone. She could see it fine if she squatted over the phone and took a picture with the flash on. After doing so she went to her gallery on the phone and looked to see a familiar image. What was between her legs was similar to what had been between the powerful hindquarters of her neighbor's horse when she had been a kid. She had a horse's pussy! It was jet black and stretched out farther down her crotch than before, and ended in a drooping slit that was formed by thick slabs of meat that were her labia.
"This is unreal... but I like it" She said with a devious grin. That was when she finally remembered that the dildo was still in her and that she had an fine chance to take it out now. "Well, better late than never... Or maybe not" She said devilishly as she thought of all the changes it had provided her so far.