Before you was a Tyrannosaurs Rex costume made of shiny bright red latex with a yellow underbelly, staring up at you with a sharp fused teeth grin. The zipper was located along the front. Also in the box was a set of latex black shorts and sports bra.
Looking down on the T Rex costume on your bed you couldn’t help but get a massive erection, for as long as you could remember you’ve had a secret fetish for dinosaurs. You couldn’t take it anymore and immediately stripped down to nothing and slipped into the suit. You felt the latex stick to your sweaty flesh making it harder to squeeze into, however you managed and let in a deep sigh taking in the smell of latex around you.
Looking in your bedroom mirror, the result was amazing, if slightly off putting. The eyes on the top of the head were plastic, forcing you to look out of the tiny nose holes, on top of that it hung of your body like a deflated balloon in most areas it was almost like it was actually meant to be worn by a real dinosaur rather than a human still, if you ignore how big it was you where a real latex T Rex, maybe it would look better if you put on the sports bra and shorts?
With nothing more to loose you slipped them on, with great difficulty trying to fit it over the overly large head, then you moved onto the shorts, just managing to squeeze into them.
Taking another look, it still looked like the costume wasn’t meant to be worn by a human. Then you noticed something weird, you could suddenly feel the carpet underneath your feet. You looked down at the large three toed claws that balanced out the suit. The costume only had three large toes and your foot was only in the larger one in the middle, but strangely you felt the toes your foot shouldn’t even be inside of. Curious you tried flexing the toes on the right and left, only to be surprise when sure enough they actually moved.
You bawked at this, then felt a tingling sensation going up your leg, you watched as the suit seamed to inflate around your caff and thighs, as they grew you felt the meat of your leg pressing against the inside of the costume almost like the suit was making you into a real like T. rex.
As your legs fully changed you lifted it up, watching as it bent in a way no human leg should be capable of. Part of you was panicking, but the other part was incredibly exited and aroused to see where this was going. The changes moved onto your waist, their was a loud cracking noise as your pelvis broke in half then reformed five times larger than. Your hips widened, straining against the confines of the black shorts, you felt your spine double in length, filling out the long thick tail just above your butt, and speaking of butts, your ass soon inflated to childbearing proportions then beyond. The costumes ass just kept growing and growing, straining the shorts to their absolute limit and forcing your ass to eat much of it just to survive. You felt your long hard manhood press again the inside of the costume straining again it’s latex prison as it was flattened to almost nothingness. You let out an involuntary groan at this, that quickly turned into a moan of pleasure.
Your spine now started to curve forward and you heard a gurgling noise in your stomach your organs rearrange themselves to accommodate your new biology. You turned once again to look in the mirror, from the waist down you started to look like a real T Rex.
Next came one of the more surprising parts, well already more surprising that a latex T. rex costume with the ability to transform you appearing on your doorstep. Your chest suddenly got heavier, looking in the mirror you saw two lumps starting to form on your chest that weren’t there when you put on the costume, you watched in fascination as they grew larger and larger straining against the sports bra and forcing you to bend forward even more. The breasts where unmistakably E cups and hung out the bottom of the sports bra like two yellow beach balls. Your shoulder cracked and smoothed out, your arms slimming down and shrinking, not to the size of a T Rex’s in relation to your body, but they were still smaller than when you first put on the costume. The hands of the costume fused your fingers together giving you three finger on each hand that ended in long white puffy soft claws after the first knuckle, that surprisingly you could still bend.
You swallowed prepared for the final step. The costume tightened around your cheeks, forcing your face forward through the hollow snout your head squeezing through the mask like toothpaste, you watched as the nose holes got closer and closer, then your eyes went upwards. You where plunged into a would of darkness, then suddenly realized your eyes were just closed and opened them, blinking a few times. You realized the plastic eyes on the top had now become your real eyes. Surprisingly your vision was forward facing, which was definitely an upside.
You then realized that you couldn’t breath, given the costumes mouth was still fused shut. You tried clawing at the mouth with your useless soft claws, but to no avail, finally you tried unzipping the costume however your claws couldn’t get a grip on something so small. Finally your nose reached end of the muzzle and you took in a deep breath of latex.
Lastly you felt your jaw reach the end of the costumes, you then tried opening the wide mouth and surprisingly enough it did. The sharp white teeth parted, strands of latex and saliva connecting them. You ran your large thick tong along your sharp teeth taisting latex and letting out a soft moan of delight in a voice that was definitely much higher in octave.
The last of the changes was just increasing your height to 7 feet.
You looked in the mirror in your room taking in your new body, you were now a red and yellow anthro latex T. rex woman with E cup breasts, however even with how big your boobs were, they paled in comparison to your moon sized ass which was almost three times As large the upper half and came with a thick tail. Part of you fantasize about what it would be like to be sat on by it. You gave it a quick wiggle watching as your reflection did the same. Your “skin” was latex smooth with seams running along certain parts giving you the appearance of a animated (if slightly perverted) pool toy, you still had the zipper running down along the front of your body from your neck to your waist, but as previously established you would need to get someone else to unzip you. Sadly you seamed to lack nipples or a vagina to play with. Your face was more like a cartoon drawing of a T Rex rather than a real one, with eyes in the front and even a set of lips to hide your toothy grin.
For a few minutes you posed in the mirror taking in your shinning form that squeaked with your movements and jiggled like a gelatin mold, this was the best day of your life…