"Lady Tsunade I-oh my goodness!" Sakura suddenly flung herself into the wall hiding her vision from the view on the TV which showed Hinata and Shikamaru in the middle of having sex against the wall of the room they had been left in. "Why are you watching that?!"
"They've been at it for hours," Tsunade stated before she checked her watch and pulled an impressed face. "Five hours and twenty nine minutes to be exact."
"That doesn't answer why you're watching them!" Sakura hissed not moving from her spot, her cheeks reddening.
"I was hoping letting them get back together would maybe make the red chakra show itself or they would at least do something to tell me what is going on," she leaned back in her chair and frowned. "But so far the only thing I have learned is Hinata is really flexible and Shikamaru must have leg muscles of steel to support all the positions they've got themselves into for so long."
Sakura made a sound somewhere between a gasp and a gag.
"How long did you say they had been at it?"
"Just over five and a half hours now."
"How on earth do they have the stamina?" Sakura asked half laughing.
A look of slow understanding formed over the Hokage's face. "Wait; what did you say?"
At the change of tone in her Sensei's voice Sakura turned to the blonde. "I; asked how they had the stamina."
"Stamina," Tsunade repeated, the wheels in her head turning. "Stamina stamina stamina why is that word ringing a bell?"
Then it hit her; and she nearly ran down her apprentice to fling the door open.
"Shizune!"
"Yes Hokage," Shizune ran up to their room from further down the hall.
"There was a study of an incomplete jutsu from Kumogakure on an enemy where it gave them incredible stamina, agility and slowly drove them insane. I think that's what has happened here. Find me that study. Now!"