There was a breif pause for a moment, while Florence finally lost her battle with Jessica's pheromones. She gave in and decided to help her needy friend.
Florence had only just began licking Jessica's engorged pussy when she was poked by her roommates surprisingly stiff clit.
'Was it growing?' Florence thought to herself. 'No, that's impossible.'
Florence was wrong though. The virus had sensed the presence of a potential mate, but had also picked up on the fact that it was also a female. With it's new victim unable to procreate with it's host, the virus came up with a simple solution to this problem; it would make it's host a male. After all, it was rewriting Jessica's dna anyway. Why not ensure compatibility too?
Florence took long licks across Jessica's plump folds. Each pass Florence would start at the very bottom of her new lover's pussy and finish with a few flicks of Jessica's lengthening clit. Jessica moaned loudly each time. Her clitoris grew with each pass of her roommate's tongue. It pulled further and further away from Jessica's sopping hole. It's tip broadened out, and the whole thing lengthened. When it grew to three inches Jessica gently but firmly brought Florence's head up to the tip of the shaft and coaxed her into taking it into her mouth. Florence readily accepted and began using her tongue to play with it as she bobbed up and down it's length.
'This is more like it.' Florence thought to herself as she moaned in pleasure, happy to be working with more familiar equipment. Jessica's musk might have pulled her into this situation but now she was really beginning to enjoy it.
'Mmmh, Jess, what a big dick you have.' Florence thought to herself as she continued to bob up and down it's length. The absurdity of her thought didn't even dawn on her, so wrapped up in lust was Florence. She also didn't notice the virus was beginning to have an effect on her body too.
Jessica and Florence were so enthralled by pleasure that neither noticed Florence's ears tugging into points and moving towards the top of her head. The virus had invaded Florence's body and there was no going back for her now. Jessica's highly contagious arousal was quite potent, and now the virus was starting to get to work on Florence.
Florence continued to service Jessica's new member, even as her own toes began cramping up. They pulled together to form a thick rigid hoof on the end of each leg. At the same time, Florence felt her roommate's cock grow longer and thicker by the moment; she also felt a strange sensation coming from her legs. 'Were they growing too?' She thought. Florence stared up at Jessica, and saw that past her massive heaving breasts her face was pushing away from her head. It looked almost completely equine now, complete with large horse ears and big flared nostrils. Florence could feel the heavy breath of pants and snorts coming from Jessica's long face. Jessica had her eyes shut tightly in what looked almost like a painful grimace but before Florence could react, it happened.
Jessica flexed mightily as her dick stood at absolute attention. She wrapped her horse like hand around the back of her friends head and firmly pressed her rigid shaft deep into Florence's throat.
Florence felt spunk shoot up Jessica's dick like a fire hose. She had no time to react as she felt Jessica clamp down on her head and thrust with her cock. Cum exploded into Florence's mouth. It was all she could do to try and swallow it all, but it just kept coming. Semen began to leak out of Florence's mouth in a mess, but eventually it was over.
Jessica slumped back against their kitchen counters. "WOW! That was intense!" She gasped with a smile on her horse-like face. "I own you one Flo... oooah... *pants* ...yeah... *pants* that was good."
Florence didn't answer though; she was too busy playing with her recently engorged pussy. Her transformation hit overdrive after Jessica's climax. Florence sat in the shreds of her pants and underwear that were strewn across the floor. She now sported two enormous horse legs, the size of which could rival tree trunks, and a long blonde tail had grown out above her now gigantic butt. She had her eyes closed in blissful ecstasy as she leaned back trying to allow her hand better access to her gapping sex. Light blonde fur grew up her legs, over her hips, and across her butt. Even as Jessica watched, she could see Florence's pudgy midriff giving way to rock hard abs. The fur raced up Florence's body and just like with Jessica it brought densely packed muscle. Florence's arms and shoulders exploded with mass as the changes continued. Her once dainty hands morphed into a robust hybrid of human and horse. Florence's already sizable tits practically burst out of her top and bra adding even more to the pile of wrecked clothes around her.
"Oooh fuuuck!" Florence half gasped and half moaned. "Jess, I need you!" Florence pulled her deformed hand away from her pussy realizing how ineffective they were now.
Florence didn't have to wait long however. Jessica had been watching her roommate transform and pleasure herself just like she herself had earlier; hence, she knew that soon enough Florence was going to need her help, and she was ready.
Jessica stroked her long horse cock as she flashed a wicked smile at her friend. "Don't worry Flo," she started. "I'll take good care of you. After all what are friends for?" Jessica hefted her beastly tool infront of her. It had kept growing even after she came earlier and it was now over a foot and a half long. She reached a hand down past her tremendous ball sack to her dripping pussy and slathered her hand with her own juices. Jessica licked it seductively before coating her gargantuan dick with her own arousal. Each stroke made her monster tool glisten more and more until she decided it was finally ready.
Meanwhile, Florence lay on the ground watching her roommate torture her with suspense, need, and anticipation. Florence's changes seemed to slow down; however, the only thing left from her human form was her desperate face. Her gentle countenance was washed in a powerful carnal lust and all that seemed to matter to Florence was being penetrated by her friend and finally attaining release.
"Now," Jessica spoke with a sexy, but commanding voice. "Show me that big beautiful horse-pussy of yours."
Florence moaned as she turned around, bent over, and presented her plump sex to her roommate-turned-stud, Jessica. Moans filled the air as Jessica brought her veiny shaft up and under her new lover. She rubbed it against not only Florence's tight abs, and giant breasts, but especially her dripping pussy. Jessica pulled back until she found her mark, and thrust hard, filling Florence to the brim.
"NEEEIGH!!!" Jessica cried out as she lost her freshly gained male virginity to her friends horse-like pussy.
"Aghhh!" Florence moaned loudly. It was electric. "Oooh!" Jessica grabbed onto her lovers hips and thrust again. Harder and harder; again and again. Florence's nose started turning color and pushing out. Her tongue lolled out of her gapping mouth; it grew a little longer and more flexible with each thrust from Jessica's cock.
Jessica was on another planet; her giant dick felt like nothing she had ever felt before! Each thrust was pure ecstasy. It sent waves of pleasure through her entire body. Still holding on to Florence with one hand, Jessica pinched one of her own nipples, the tweek adding to her bliss. She reached down past her balls again, and plunged one of her thickened fingers into her lonely hole.
It was too much! Jessica grasped Florence's muscular waist tightly and clenched every muscle in her body. Jessica came. For the second time, a mighty flood of her seed erupted into her roommate. Florence screamed as she too climaxed, and she clenched down hard on Jessica's throbbing cock. Florence milked her lover for all she was worth, but there was still too much cum for even her tremendous pussy. It spilled out and pooled on the floor.
Jessica collapsed onto her roommate's back as the pair basked in the after glow of their activities.
"Hey... Jess..." Florence panted quietly.
"Egh?" Jessica groaned back.
"...what just happened?" Florence continued between gasps.
Jessica paused before she responded. "I have no fucking clue."