Because as far as Tsunade was concerned, she belonged to Shin Uchiha, and so did Konoha. Even this Tsuchikage scroll was his. Of course she would listen to her man's advice.
Shin Uchiha naturally had no idea what Tsunade was thinking. After hearing her suggestion, he gave her a somewhat startled look.
Shin Uchiha had never expected his mission to be completed so inexplicably.
After half a month of hard work, Elite Jonin Shin Uchiha had finally managed to bed Lady Tsunade, one of the Sannin, into submission through tireless effort and dogged persistence, making her consider returning to Konoha.
Shin Uchiha naturally approved of Tsunade's desire to return to Konoha. In his opinion, having her take over as Hokage was also the best outcome.
After all, Tsunade would probably be pregnant before long. Rather than having her run around outside, he would feel much more reassured if she stayed in Konoha.
Besides, he could not stay by Tsunade's side all day. Konoha was her home base, and with his covert help, she would have no trouble taking control of the village, including Danzo's Root. Once that happened, Tsunade, as one of his own, would also be a great help to him.
He had long since grown tired of seeing the Third Hokage's old face, too. Better to let the Third Hokage retire and enjoy his remaining years. At least he could have a decent ending instead of getting killed outright by his student Orochimaru.
Seeing that Shin Uchiha agreed with her, Tsunade wasted no time. She first had him put away the Tsuchikage scroll, then told Shizune to return to her room and pack so they could leave at any time.
Once Shizune went out, Tsunade threw her arms around Shin Uchiha and pressed her red lips against his.