But Ty wasn't done yet, and focused on her pussy lips again.
Lisa moaned softly, as she looked at Ty with adoration. "You know, I'm starting to love every time you're giving me these changes, so exciting!"
Ty looked up in surprise, blinking. "You don't wanna know what I'm changing?"
She waved her hand dismissively. "Oh if its big, sure, but you're just making me even more hot, and doing things that I can't do myself, you know…"
Ty nods at that, and continues his focus.
Lisa hisses a bit, as she twitches her leg. On her crotch, on her pussies' lips, metal was growing. More accurate was to say that little studs started appearing next to each vaginal lip, little rivet-like small bumps lining them up.
Small bulges appeared under both pussy lips, her tongues feeling both new addition. "Ohhhh, teeth? Wait, no, is it…?"
She gaped both pussies, and tongues shot out to curl the newly studded lips, she looked down, and gasped as she saw zipper teeth aligning each pussy.
"Haha! Not quite vagina dentata, but this'll work…" Lisa looked up at Ty again, expectantly. "Do they also have…."
Ty grinned. "Yes! Feel around!"
He saw her tongues thrashing around a little, until one of them felt under her clit, and she gasped as she felt the sensitive new addition there.
Slowly, and with gritted teeth, holding in moans, she curled her tongue around the zipper's ring, and pulled it down.
From Ty's perspective, it looked like the underside of a zipper was now slowly moving down, behind her pussy lips, joining them together.
With her one pussy now sealed off, she tried the strength of the zipper teeth. He could see her muscles try to open and gape her pussy, with the studs still linked together, and her pussy lips slightly opening to show the clenched teeth of the zipper holding it still together.
Lisa gave out a small moan, and softly said, "God, Ty, this is so hot, you have no idea how hot this is…"
She frowned, and moved her tongue under the lips of hew face, and she perked up with recognition. "Wait, you added them here too?"
Ty was confused, "Huh?"
Lisa showed him, she curled her upper lips at him, and he looked up in shock as he saw the same zipper teeth exist there, only not all the way.
Ty looked a little embarrassed. "Oh, that must've been when I was focusing on adding them down there, I could remove them if y-"
She interrupted him. "Nonono! Do it all the way!"
He stared at her, and then sighed. Focusing more, the studs' stubby ends properly appeared above and under the lips on her face, and she opened her mouth, curling the lips, to show them sitting right between her teeth and lips, in that little holding space there.
She closed her eyes, and her tongue appeared to fish for something on the left or the right side of her lips. She found it, and a quick zip later, she opened her mouth, or at least tried to, showing the zipper teeth in place.
With her upper mouth sealed off, she started putting up a little show for him, pretending that she was distressed that she couldn't open her upper mouth, her struggles against the zipper, while in the lower pussies, she slowly opened the zipper, and moved her tongues around, "licking" their new lips, before closing and opening the zippers again.
With her moving the zippers back and forth, Ty got an idea. "What if I gave you something to chew on? It's bad practice to eat with your mouth full…"
Lisa looked up confused, and Ty walked over to the kitchen. Luckily, he found what he needed in the cupboard; a bag of walnuts.
Lisa eyed him bringing the walnuts, and opened her mouth in an "Ah" understanding motion, or at least tried to.
Crawling onto the bed, Lisa opened the zipper on one of her pussies, and held out her tongue in a beckoning motion.
Ty deposited one walnut into the pussy, which grabbed it and pulled it inside. She shivered, while that pussy closed itself, and the other pussy unzipped.
While he held out his hand to feed the other pussy a walnut, he heard muffled crushing noises in her other pussy, and bulges and writhing on that are of her crotch. Her eyes had a mischievous glint to them, as she watched him silently.
The pussy tongue licked his frozen hand, beckoning to deposit the walnut.
As the zipper of the other pussy closed itself, there was a ripple under her crotch near the first pussy. Then, the zipper of that pussy started to open again, and there was no sign of the first walnut.
Ty looked up at Lisa, in slight amusement, and as she only looked back with a zipper-toothed grin, he was distracted again by a tongue licking his hand, wanting more.
This went on for a little while, a dozen (or so) walnuts entering her womb, crushed and "swallowed".
She moaned through her zipper-teeth, and shivered, as she lost control of her crunching momentarily, as her orgasm compressed both of her pussies at once.
Amused, Ty grabbed a few walnuts at once, and Lisa blinked in surprise.
Both her pussies took them all in, half a dozen each, and as she closed the zipper on both of them, she started rising from the bed.
She pushed Ty on his back, both his cocks exposed to the air. Lisa knelt with her legs next to his crotch, and started grinding the pussy-zipper-teeth against both his cocks.
Lisa kissed his torso with her locked lips, while her locked lower lips had its crushing reverberate throughout the teeth.
Ty could feel her fluids slip past the teeth, and as he imagined it saliva, it became more fluid and gushed out in greater quantities. With none of her tongues available to clean it up, she was lubing up Ty's cocks.
Eventually, Lisa orgasmed again, and as she shivered, Ty could feel her new crotch muscles compress all the walnuts inside once more.
After another "Swallow", she opened both her zippers again, and started cleaning both his cocks with her tongues, her tunnels sated.
Ty sighed in content as he could feel the studded tongues glide over his cocks, and reached in to give Lisa a quick kiss on the lips.