now

*Squelch* *Squelch* *Squelch*

“Huff, Huff,” Allison breathed heavily as her big brother sucked at her teat.  She could feel his little hands grope her massive, milky breast as he greedily drew from it.  His fingers dug into the soft, spongy flesh bigger than his body and as wide as his little chest.  He was pulling the immense teat, or trying to pull it, toward him.  Allison forced herself to open her eyes and push past the deep erotic pleasure to look down at Mitch.  “Yesssss,” she hissed down at him, “suck that titty.”  Mitch didn’t stop or even acknowledge her.  He just continued to swallow mouthfuls of milk, his cheeks puffed out.  Little rivulets of milk came from his mouth and drops splattered onto his face.  

He sat, naked on her thick thigh covered in skin tight yoga pants.  His right foot was pushing up against her other thigh to give himself leverage.   His extreme nervousness and embarrassment had disappeared as he lost himself in the sweet nectar of her milk.  In between his legs his little pecker had stiffened and his cute testicles rested warmly against her.  Allison couldn’t help herself, Mitch was so compliant she felt she could afford to push the envelop with him.  Reaching over with her right hand, she lightly brushed her fingers against his stiffness.  

To her shock, Mitch didn’t break off from her stiff, milky nipple.  Instead she watched as his wide eyes looked up at her, questioning and pitiful.  “Oooooh, Mitchy, this part of you was looking so uncomfortable.”  Allison cooed down at him.  He wasn’t stopping, but Allison could see it in his eyes.  He’d accepted the breast feeding, being placed nude on her body.  But this, being jerked off on his sister’s knee while it was going on?  That was too much.  He was begging her, his little sister.  Don’t do this.  

Allison’s crotch was soaking wet.  She regretted that both of her hands were busy, one steadying Mitch and the other toying with his cute little manhood.  The right side of her upper lip twisted into a superior, toothy grin.  “Its okay,” Allison cooed as she continued running her index finger and thumb lightly against her brothers shaft.  She bounced her thigh a little, making him squeeze her breast for stability.  “Huhnnnn” she growled out.  That felt so good.  Even when he squeezed her with all his strength, his shrunken arms couldn’t exert enough force to hurt her. She started stroking Mitch faster.  He bucked his hips against her hand and his little body shivered as ropes of cum shot from his pecker.  

Finally, needing to breath, Mitch broke from his sister’s nipple.  Still tasting the sweet honey of her inside his mouth and inhaling her scent all around him, he looked up with feelings of containment and shame.  He’d just sat there, unable to stop sucking his sister’s tit as she jerked him off!  He saw that Allison had removed her hand that was covered in his cum and brought it up to her mouth.  She looked down into his eyes and then she winked.  She stuck the cum covered hand inside her mouth and sucked.  Her eyes closed and she hummed in pleasure.  Her hand on his back languidly stroked him, like a mother would a child.  Mitch blushed furious red and to his horror, already feeling his manhood twitching and stiffening in reaction to Allison.  

Then 

“What do you mean I have to strip naked!”  Mitch looked up at his towering sister with a mixture of disbelief and fury.  Allison’s beautiful face twitched as she struggled not to smile.  In all honesty he was taking this better than she had assumed he would.  “Darling, you kn-o-w I had that little scare when I shot up half an inch in a week, remember?”  He visibly calmed as his mind turned away from the present to the past.  “Yeah, you said that it was nothing…” He looked up at her accusingly.  Allison’s almond brown eyes shifted downward as she began nervously playing with her fingers.  The action caused his sister’s enormous chest to push together.  Swelling up out of her top and then sinking back down.  What stunned him most about the unintentional display of hotness was just how cute Allison still looked.  His sister was still cute despite towering over him by more than two feet!

“Hey,” his big brotherly instincts kicked in and he reached up.  He had intended to place his hand on her to reassure her, but found that rather than reach her shoulders that towered so far over his head he could reach them even while jumping, he instead made contact with his sister’s firm bare thigh.  The thick tan flesh was soft to the touch.  But underneath Mitch could feel the massive muscle that Allison’s leg possessed.  It was almost as wide as he was and a little taller too!  He was lost for a moment, forgetting everything until… “Uhm, Mitch?”  He shook his head and looked up.  Allison’s breasts blocked her face from his view when he was this close to her.  But she had stopped fidgeting her fingers.  “Its okay, sissy.”  He used the nickname without thinking.  But it seemed to work, she giggled causing her chest to bounce and ripple above him in her tight top.  

“Thanks, big bro.”  Allison was clearly pleased and refocused.  “Anyway, I didn’t want to worry you but, I kinda slipped into stage two. It turns out the Blake Virus didn’t like to be messed with.”  Mitch felt his blood run cold.  “No…”  He hissed.  Allison’s immense body descended to the ground quickly.  Mitch on instinct jumped backward.  His sister’s knee hit the ground causing a loud boom due to her size and weight.  Even kneeling, Allison loomed over him.  “Don’t be alarmed Mitch it’s okay.  We got in there, tweaked it, and everything is fine now.”  Mitch shook his head.  “So why do I need to suck your….uhm,” he stumbled.  “Milk, Mitch, you realize you’ve breastfed before, right?”  He stomped his foot.  “Yes, but not as an adult and not from my fucking sister.”  Allison sighed.  “Well, you’re just going to have to get over this silly awkwardness you have toward what is a very normal and very natural process.”

Mitch’s face twisted up, “this look natural too you?”  He gestured to himself and her.  Allison’s left lip twitched up.  She’d loved seeing him be more like his old self.  More funny, sarcastic, and confident.  “Welllll, maybe not normal for other people.”  Her smile faded and she got a very serious look on her face.  “But you need to accept,” she moved closer to him, her massive breasts squishing against him.  “This is how things are, brother dear.”  She fought against the voice inside her.  Even modified, the virus made certain changes to them, no not the obvious ones.  Increased libido, especially in the female body.  It created a combination of chemicals that made a woman feel really good about being big and lowered her inhibitions.  In the male body, the virus caused men to ooze hormones that triggered a mixed maternal and sexual instincts in even unaffected people, most likely as a survival mechanism.  End result.  The bigger Allison got the more her mind was conditioned to feel good about being big.  The smaller Mitch got the more attractive he became due to the potent chemicals his body oozed.  Subconsciously, this lead Allison and anyone with extended exposure to an infected boy to associate smaller is hotter!  

She knew all of this intellectually.  But, knowing and experiencing happened to be two different things. 

“We made it so my body produced a non-harmful variant that should regulate you.  Part of reversing my condition was us having to reintroduce the lactation inducing parts of the virus with heavy modifications.  I need to be milked, and frankly, unless you want to risk shrinking into stage two you need to start breast feeding from me daily!”   Mitch gulped.  Looking down he said in a soft voice.  “But….why naked?”  Allison just gave him a wink, “Simple, I want to make sure your body isn’t reacting poorly to the milk.”  She was lying her ass off.  She really just wanted to see him naked.  But Mitch didn’t need to know that….