[* 3rd Person POV *]
Tsunade watched every single second of the pathetic, premature, squirting climax with cold, fascinated amusement. Her golden eyes gleamed with newly sharpened sadistic interest as the body that wore her face came undone completely from nothing more than the promise of what the third slug was about to do. The thin smile on her lips never faded.
The third chakra-slug did not wait for the aftershocks to finish.
While Robin's body was still locked in the last waves of that fear-triggered orgasm, the cool, translucent creature pressed forward with renewed determination. Its sticky, luminous tip pushed against the tight, slime-coated rim and began the slow, relentless work of forcing entry. The ring of muscle clenched hard in instinctive refusal, trying to keep the living invader out. For a moment the slug's soft body deformed slightly against the resistance, mucus spreading in a glowing ring around the entrance. Then it pulsed, flattened, and pushed again.
Robin's cry turned into a long, broken moan.
"It's—ahh—trying to get in—my ass is fighting it—I can feel it stretching—nngh—!"
Tsunade laughed, low and rich with genuine amusement.
"Look at that greedy hole clamping down. It doesn't want to let the little thing in, but it's going to lose. Keep moaning for me while it ruins you."
The slug pushed harder. The tight ring yielded a fraction, just enough for the very tip to slip inside before the muscle seized again and tried to force it back out. The sudden stretch sent a violent shudder through Robin's entire body. Her back arched. Her massive breasts bounced heavily. Another small, helpless orgasm fluttered through her cunt around the two slugs already buried there, clear fluid spraying in weaker arcs across the debris.
Her face had already begun to slack into something shameless. Golden eyes half-lidded and unfocused, mouth open, tongue starting to peek out between parted lips the beginnings of a full ahegao forming under the combined assault of the aphrodisiac and the relentless pressure against her ass.
"It's inside—just the tip—but it's so cold and slimy—ahh—my hole keeps squeezing and it only makes the stretch worse—I can't stop clamping—every time I squeeze it feels bigger—!"
Tsunade rested her chin on her hand again, watching with open delight.
"Pathetic. You're cumming from a slug trying to open your ass and you still can't stop your hole from fighting it. Go on. Tell me how it feels while it forces its way deeper."
The struggle continued in earnest.
Every time the slug gained a few millimeters, Robin's oversensitive, aphrodisiac-soaked rim clamped down hard, trying to expel the cool living weight. The creature simply pulsed, secreted more glowing mucus, and pushed again, using the fresh slickness to slide a little farther before the next violent clench.
The battle was slow, wet, and humiliatingly loud. Soft, filthy sounds of stretching muscle and squelching slime filled the ruined room. Each failed attempt to keep the invader out only stretched her further and painted more luminous mucus across the sensitive ring.
Robin's moans had lost any remaining dignity. They came out high, continuous, and openly slutty, broken by gasps and the wet noise of her own body giving ground.
"It's winning—nngh—every time I clamp down it just slides deeper on the next push—my ass is getting so full of cold slime—I can feel it pulsing inside the rim—ahh—another one—I'm cumming again just from the stretch—!"
Her face completed the ahegao. Eyes rolled back until only a sliver of gold remained visible, tongue lolling out, a thin string of drool connecting her lower lip to her chin. The expression was pure, mindless, overwhelmed pleasure mixed with the last scraps of panicked awareness.
Another orgasm hit her as the slug forced another thick segment of its body past the resisting ring. Clear fluid gushed around the two creatures still occupying her cunt. Her thick thighs shook so hard the debris beneath her rattled.
Tsunade's laughter grew warmer, almost fond in its cruelty.
"There it is. That broken face. You're taking a chakra slug up your ass one pulse at a time and you look happier than you've ever been. Keep that tongue out while it finishes opening you."
The slug was relentless.
It advanced in short, determined surges, each one met by a desperate clench that only delayed the inevitable. The tight entrance was forced wider, the glowing mucus making every millimeter of progress both easier and more intense.
Robin could feel the cool, living weight spreading her open from the inside, coating walls that had never been touched this way. The aphrodisiac turned every small victory of the slug into another cascade of forced pleasure. She came again when the thickest part of the soft body finally popped past the rim. She came again when the creature began to undulate deeper, exploring the newly conquered heat. Each climax left her weaker, louder, and more shamelessly open.
"It's all the way in—ahh—I can feel it moving deeper—my hole is still trying to squeeze it out but it's too late—it's filling me—the slime is so thick—I'm going to keep cumming every time it pulses—please—I look so stupid—my face is stuck like this and I can't stop moaning—!"
Tsunade watched the final inches disappear with cold, satisfied interest. The third slug was now fully buried in the fake's ass, its soft body shifting and pulsing inside the tight, slime-drenched channel while the two companions in her cunt continued their own slow exploration.
Robin remained locked in that pathetic ahegao, tongue out, eyes rolled, body shaking through yet another overlapping orgasm as the living creatures settled in and the aphrodisiac promised there would be no recovery, only more.
The real Hokage's thin smile never faded.
"Good girl," she murmured. "Now let's see how long you can keep that face while they start moving together."
[A/N - Just opened up a patreon for 3 dollars - 5 chapters ahead so if you wish you can purchase it!! Otherwise my updates will still remain consistent so there won't be any issue if you don't purchase it either! So now imma spam this on each chapter]
[A/N - Also now I include images for each chapter]
Link is present in the synopsis