After a few minutes of settling their breathing, the sound of footsteps returning upstairs echoed in the hall. Tsunade finally snapped out of her post-climax daze.
"Get... Get up!" she whispered frantically.
Hearing Kushina's approach, Saiki was also nervous, but the thrill of it only caused his flagging "fighting spirit" to surge back to life.
Feeling him harden inside her again, Tsunade panicked. She whipped her head around, her voice a mix of a desperate hiss and a glare that promised murder. "Get off me this instant! Do you hear me?!"
"No rush, Sister Tsunade. No one is going to find out," Saiki replied with a calm that bordered on the demonic.
In that moment, Saiki's innocent, youthful face looked like pure evil to Tsunade. She wanted to explode with rage, but she had nowhere to vent it. She could only lie there in a state of terrified trepidation.
Finally, Kushina reached the door. Her footsteps stopped.
Saiki and Kushina's rooms were directly across from each other. Staring at the door and remembering how Saiki had looked—half-dead and exhausted—when he went upstairs, Kushina's face filled with worry. "I wonder how Saiki is doing? Should I check on him?"
She reached for the handle but then remembered Tsunade's strict instructions before bed: Do not disturb him. Let him rest. Ultimately, she stayed her hand and kept walking.
Inside the room, Tsunade was a wire of tension. If Kushina had walked in, her life would be over. In her panic, instead of pushing Saiki away, she ended up hugging him with a crushing intensity, her body shivering.
It wasn't until the sound of Kushina's door clicking shut reached them that Tsunade's hyper-focused nerves finally slackened. She went completely limp, as if every ounce of her strength had been siphoned away.
Seeing her reaction, Saiki rested his chin on her fragrant shoulder. He blew a puff of hot air into her ear, whispering, "See, Sister Tsunade? Sensei Kushina didn't suspect a thing. There's no need to be so tense."
He fully expected a beating for teasing her like that, but Tsunade's response caught him off guard.
"Nngh..." she let out a low, enticing hum. She tilted her head away to hide from his breath, whispering in a voice so soft it was almost a ghost, "It tickles."
Saiki's heart rate spiked again. This wasn't the reaction of a woman who hated him. He could feel it now: Tsunade was finally dropping her guard.
He simply held her quietly. Having just reached the peak, Tsunade's body was scorching hot and hyper-sensitive. Every time Saiki's breath brushed against the sweat-slicked skin of her neck, her entire frame shivered.
Tsunade truly had no strength left. She had come four times tonight. Given her constitution and age, she could likely handle several more rounds if Saiki forced her, but she was mentally exhausted.
"Stop... it tickles..." she whispered again.
Saiki was ecstatic. He squeezed her a bit tighter. "Sister Tsunade, you're the best!"
Tsunade wasn't some naive schoolgirl; she wasn't about to be completely fooled by a few sweet words. Feeling Saiki's "resurgence"—despite having already gone three times—she didn't even have the energy to scold his monstrous stamina.
"Get off... you're heavy..." she murmured.
Her voice lacked all authority; it was the lazy, content tone of a woman who had been thoroughly satisfied. Saiki was vibrating with excitement. Tsunade was finally accepting him. If this were a week ago, she would have punched him through the wall by now.
"But Sister Tsunade, it still feels so good... I don't want to stop," Saiki said, looking into her dazed eyes.
Locked in each other's gaze, Tsunade finally felt a spark of genuine irritation. She glared at him. "How many times do you need, you brat?! Are you ever going to be finished?"
Saiki put on his most "pitiful" expression. "I can't help it. It's because you're too beautiful, Sister Tsunade. I'm addicted."
His "it's not my fault" attitude nearly made Tsunade's nose twitch with annoyance. She fixed him with a murderous emerald stare. "GET. OFF."
Seeing that she was reaching her genuine limit, and having finally secured a breakthrough in their relationship, Saiki decided to play it safe. "Uh... alright. But Sister, I still need your help with the treatment."
"No! I'm done! It's not my problem!" Tsunade snapped, trying to retreat back into her shell of frigid indifference.
Saiki knew women were fickle. Seeing her mood turn cold again, his heart sank. He looked at her, lost and unsure of what to do.
They stared at each other in silence for a long minute. Finally, Tsunade's gaze softened. Her face flushed red as she whispered, "Fine... what do I have to do?"
Normally, Tsunade would have been happy to let Saiki wallow. But that "wicked thing" was still hard and buried deep inside her. She couldn't just leave it there.
Saiki's heart soared. "Just one more time, properly. Sister Tsunade, you sit on top. I'll handle the energy circulation from below!"
Without waiting for her to agree, Saiki sat up, keeping her wrapped in his arms. They transitioned into the "Vajra-Maid" meditative pose, perfectly aligned for Dual Cultivation.
The shift in weight created a sudden, deep pressure. Tsunade let out a sharp hum as she was fully impaled.
Knowing he couldn't let her speak—lest she start making excuses again—Saiki slid his hands down her smooth back. He cupped her voluptuous, ripened peaches and began to gently knead and lift her.
Tsunade had intended to give him a lecture, but as his hands began their work, the scolding words were replaced by a series of rhythmic, low groans.
Aside from Kaguya Otsutsuki, Tsunade was likely the most powerful woman in the history of the Shinobi world. Consequently, she was the ultimate "cauldron" for Dual Cultivation.
Practicing with her provided a recovery speed that Nono'u and Tsume couldn't hope to match.
Knowing his internal state was still fragile, Saiki finally reigned in his lust and focused on the cultivation.
Of course, "focusing" didn't mean he wasn't enjoying the physical sensation.
As the Pre-natal Qi began to cycle between them, a state of spiritual resonance was achieved. It was a feeling far more profound and euphoric than simple sex.
Tsunade's body reacted with total honesty.
As Saiki moved the energy, Tsunade felt the power surging through her. She had worried he was just trying to take advantage of her again, but when the Auspicious Cloud manifested above their heads and blanketed them in light, she knew he was being serious.
Under Saiki's guidance, she felt the flow of natural energy for the first time.
The energy was drawn into the room, absorbed by the cloud, and transformed into rain that vanished into their skin, feeding their shared cycle. Saiki's internal energy began to stabilize at a visible rate.
The exchange of high-level energy acted like a purifying wash for their systems. The sheer pleasure of the energy-scrub, combined with Saiki's physical "bullying," made the exhausted Tsunade begin to twist her waist and respond with newfound vigor.
Because of Tsunade's immense vitality, Saiki felt his reserves refilling faster than he ever thought possible.
The natural energy in the room grew so dense it began to form a visible white mist.
To avoid alerting the village sensors, Saiki kept the intake restrained; otherwise, a massive energy funnel would have formed over Konoha again.
But none of that mattered to Saiki. What made him the happiest was the realization that Tsunade had finally, truly accepted him into her life.