Seeing that she was already committed to it, Blake urged Jeff to just let it happen. Jeff was surprised by Ava's actions, but it felt really good regardless, so she couldn't refuse Blake's insistence. So they both watched as more and more of Ava disappeared inside of the tail pussy, until just her dick, balls and legs hung freely out of the end.
While she was slowly being sucked inside, Jeff took this chance and lifted her off the ground and slid her cock out her lipple. She then swapped it out for her balls, and had her boob swallow them up instead. This caused Jeff's tail to start twitching as Ava thrashed around from having her balls sucked on.
But time wasn't on Jeff's side, and within the next minute, Ava's balls were forced back out of her lipple, as they disappeared up her tail pussy, along with the rest of Ava's body. Jeff could feel the full sized human inch her way closer and closer to her body until she felt Ava's arms reach into her womb. And through both of their efforts, Ava was finally passed through Jeff's tail pussy and was now curled up inside of Jeff's womb. A small pinch signaled their connection as an umbilical cord hooked itself to Ava's bellybutton.
Jeff could feel Ava's heart beat and breathing stop, as her body took those functions over for her. This lasted all of 5 minutes, as due to her massive pregnancy bulge, Jeff and Blake were forced to separate. Something neither of them were too happy with. This began Jeff's struggle into her self induced labor, and soon Ava's head poked free of Jeff's pussy. The newly born Ava opened her eyes and smiled while looking up at Blake. "You must be my new Daddy" She joked.
Blake blushed, thinking of a world where she and Jeff were husband and wife, and with Ava being their appropriately aged and grown, newborn daughter and not the fully matured girl she currently is. It took Blake all of her will power to not use the chronivac to make it a reality. But she did agree with Ava's words. "That's right, I'm your Daddy, now be a good girl and help relieve Daddy's balls." Blake then shoved her cock down Ava's throat.
Not needing to breath made Ava able to devote her entire mouth and throat to pleasing Blake's cock. And the subtle difference in flavors had to be Jeff's cum, aka, her Mommy's cum. Being just a head sticking out of Jeff's pussy, Ava didn't have a whole lot she could do. So when Jeff stood up, she was forced to hang upside-down while Jeff squatted and began pushing. Slowly but surely, Ava's body was forced out against her will. She never let go of Blake's dick though.
But now there was an issue to resolve. Ava may be out of Jeff's pussy, but the girl's were still attached, with Jeff still being Ava's entire life support system. She had no current pulse of her own, nor had she taken a single breath in the last several minutes either. Jeff contemplated just tearing off the cord and being done with it, but something about being attached like this was kinda exciting.
Jeff looked down at the cord running out of her oussy, and couldn't hide her smile. With her belly back to normal size, she was really turned on by the sight of her new addition. It was so weird, yet kinky beyond belief. So she decided to keep the connection for a while. However she needed to make one change first. All she wanted to do was make the cord infinitly stretchable, unable to be hurt or damaged, and unbreakable outside of her pulling it off herself.
It now was Blake's turn again. So Jeff handed it off to her and retook her seat on top of her lap. As Jeff wiggled her ass into place while feeling Blake's cock poking the back of her pussy, she held her new tail up to her left boob, and ate herself out with her lipple's tongue really going to town on the tail's clit.
Blake on the other hand, was enjoying having Jeff sit on her lap as if she belonged there. So she used her turn to alter her cockhead. She gave herself a canine style knot and made her legs extremely flexible. She then slightly altered Jeff, so that her cord now passed through it's own hole, and freed up her pussy. She then altered it to now be receptive to being knotted. Looking down at Ava, who was sad that the cock she was sucking on was removed from her mouth when her "Mommy" claimed it for herself. Pouted at Blake's feet while on the ground.
Seeing that sight, Blake couldn't just leave Ava like that, so she gave Ava the lust of a foot worshiper, and gave Jeff a fetish for always wearing high heels. She also gave Jeff the limited strength needed to wear them, but to compensate, made her dependent on wearing them in order to stay balanced.
With her turn over with, Blake pressed her right, stocking clad foot down onto Ava's panting face as the girl lewdly came simply from being stepped on. She didn't press down hard, but just enough to toy with Ava. Jeff watched the show with interest, and then joined in by pressing the heel of her left high heel that had materialized on her feet, down into Ava's pussy, sliding it in and out of her for fun.
While she was cumming a 3rd time from being teased by her 2 favorite pairs of feet, Ava regained control over herself enough to put a stop to it. She struggled to resist her urges, but managed to stand up. She then tried to pull Jeff off of Blake, but discovered that it would be impossible for some time, as Blake and Jeff were thuroghly knotted together. But Blake stood up to meet Ava's eyes, causing Jeff to slide off and dangle with her ass in the air by the knot in her pussy. She supported herself with her hands as best she could, but they were beyond shaky from how amazing her pussy was feeling. So while Ava and Blake were challenging one another, Jeff was loudly moaning from both of her lipples while her milk poured out from her face tit all over the floor.