Both Parents got Infected
For a moment, the four family members simply stood in silence. The two sisters' parents had heard strange sounds coming from Margaret's room and had come to check on their two daughters. When they opened the door they were shocked to see that their daughters had mutated into a fused spider creature and were left stunned as Sophia's dog cock sprayed both of them with cum, a generous amount landing in their open mouths. After several seconds,, Sophia finally broke the silence
"Oh god! Mom, Dad we're sorry!" She shouted from Flora's crotch
"While we were cleaning Sofia was infected somehow and then she infected me and we ended up fusing together and it felt SO GOOD that we came all over the room." Flora blurted out an explanation, both her arms and her pedipalps flailing wildly.
The sisters' parents stepped forward and wrapped their children in a hug, their cum-stained clothes sticking to Flora's naked torso.
"Don't worry girls, no matter what form you take we still love you, even if you just infected us with the mutation liquid." There mother soothed
"Look on the bright side. If we mutate, our jobs have to give us a month of paid leave!" Their father added with a chuckle.
At that point Sophia noticed a very distinct bulge growing inside her mother's sweatpants, creeping closer and closer to her face
"Uh, Mom? I think your changes have already started." Their mother backed out of the hug and stared down at her crotch, surprised by the already huge bulge jutting from her crotch. She then noticed something else, or rather the lack of something: her breasts were gone!
"Am I turning into a man?" She asked to herself out loud, but despite her still growing penis and flat chest, her feminine curves remained. If anything, her hips seemed to have grown wider.
"Well, if your changing sex, at least you and dad will still match" Flora commented, pointing to her mother's husband. His pudgy dad-bod had begun to drastically transform. His flabby arms became thin, toned arms like you would see on a female athlete. His belly tightened into a six-pack as his waist thinned considerably. His hips widened, his legs lengthened, and his butt became a plush, bubbly ass.
"Wow, I haven't been this fit in years!" The sisters' father exclaimed, shocked to hear that his voice was now a sultry, womanly tone. As if the changes were spreading out from his vocal chords, his lips were next to change, becoming a shade of pure white as they plumped up into sexy dick sucking lips. His nose shrank and his eyes changed colour, the whites turned pitch black while his irises and pupils turned the same shade of white as his lips. His entire face became rounder, slowly being framed by his rapidly lengthening hair, which was slowly changing colour to match his lips and eyes. His hair continued to grow, brushing his nipples as it cascaded down his body all the way to his knees. As if in response to the stimulation, the skin around his nipples puffed up into giant F-cup breasts.
Flora and Sofia’s mother looked up at her husband's body, gazing at his curves before getting lost in his strange eyes.
“Wow honey, how does it feel being so tall? I’m five foot five, so you must be over seven feet tall now!” as she complimented her husband he, Sophia, and Flora all looked at her, their faces shifting to looks of concern.
“Actually Mom, Dad only grew like three inches, you're shrinking.” Sophia said
“Well half of you is shrinking at least” Flora added
Sophia’s mother looked over at her daughters and noticed that she was now level with the bottom of Flora’s breasts! She looked down at her body and saw that while her upper body was shrinking, from the hips down her body was the same size, in fact it might have grown even more since she last looked. The bulge in her pants meanwhile, continued to grow larger and larger, as if it was stealing the mass from her torso to fuel its growth. As her shrinking continued, her arms pulled into her shoulders, leaving nothing but the empty sleeves of her now way oversized t-shirt.
“How much more am I going to shrink!?” She yelled, as her navel vanished into her hips
“Honey no matter what happens, I’ll always be with you!” Her husband soothed, an edge of panic creeping into his voice as he watched her nipples disappear.
"Oh god I'm so sorry mom, at least I'll have Flora to do stuff for me, but without arms anywhere how will you do anything?" Sophia cried, now able to look her mother in the eyes since she was just a head on legs. But even her head wasn't spared as it to began to sink into her hips.
"Even if I lose the ability to talk, remember that I'll always love each of you, and please tell Margret and Isaac goodbye for...." Her sentence was cut off as her mouth vanished, followed quickly by the rest of her head. With one last burst of growth her cock, no her three cocks tore her sweatpants to stand erect, five feet long and two feet around, each with it's own pair of watermelon sized balls crowding between her legs. At the tip of each cock, instead of a normal mushroom tip, was an exact copy of her head! The three other family members cried out in joy as they realized that she wouldn't be left unable to speak. When she opened her mouth to voice her relief however she didn't even get an entire word in before she was rocked by a gargantuan orgasm, dozens of litres of cum blasting out of each of her mouths. She managed to turn a way just in time so that none of her cum directly hit the other three, but her daughters spider abdomen was speckled with dots of cum from the splash back.
While his wife's orgasm continued, the father felt a sharp tingle shoot through his body and he bent over in pain, grabbing his sides as two lumps formed under his arms. The lumps pushed his hands away as they grew into a second pair of arms, tearing his shirt off in the process. Unlike his original pair however, these were covered into white chitin and had had fluffy tufts of white fuzz growing from the wrist to the elbow. As he examined his new limbs, a pair of antennae , also covered in white fuzz, sprouted from his head, sending confusing waves of new sensory information to his brain.
“What am I turning into?” He questioned as two pairs of fuzzy white-patterned wings grew from his back.
“It looks like some kind of humanoid moth.” Flora offered
“I think you look cute!” One of his wife's heads beamed, her orgasm having ended, and her cocks now sitting at half-mast
Before anymore could be said on the subject, he felt a tingling in his crotch. Expecting to now lose his penis, he was surprised to feel tightness in his jeans. Undoing his fly and pulling down his underwear, he found that his cock was now a ten inch long monster, with two apple sized testicles to match. While impressive by normal standards he felt a pang of jealously when he realized that it was still the smallest cock in the room at the moment. That feeling didn't linger long though as a massive growth appeared just above his toned posterior, bringing a flood of sensations just as intense as when his antennae grew in. Without missing a second, the growth exploded in size, growing three feet out behind him like a tail, powerful new muscles holding it up so it only sagged a little. It was covered in even more fuzzy white chitin and hand the distinct shape of an insect abdomen.
“Hey, there's a strange feeling coming from the tip of this thing, could one of you take a look” he said, pointing his abdomen-tail towards his wife.
“Ohhhhh” her right head seemed intrigued
“hehehe” her left head stifled a giggle
“Well Honey, it looks like you have a vagina on the tip of your abdomen!” her centre head proudly stated
He sighed, well at least he still had his cock, even if he now had a second sex organ now. Looking over his body, he though that since he had such a womanly body it might be easier to start identifying as a woman, but that was a discussion that he would need to include his wife (or maybe it was wives now, he wasn't sure) in.
The four family members took a minute to take in both their new bodies as well as the bodies of their loved ones before the moment was interrupted by Flora and Sophia's mothers left cock head.
“Well since I don't have arms anymore it looks like you three will have to clean this room before we follow Gemma to the hospital”
*Who does the story follow next?
Gemma, Margret, and Isaac