Tsunade has her own idea

"mmm, I guess you're right that one of our clan must perish for the other to survive" she suggested as she kneaded one of her breasts and bit her lower lip in sensuality. Sasuke smiled victoriously, seeing that the Hokage agreed with him "but" a simple word was all it took for Sasuke to change his triumphant smile into a confused grimace "I don't think it's the Senjus that have to disappear" Tsunade hinted bringing a hand to the back of the Uchiha's neck, using her titanic strength to make sure their faces were very close to each other and for him to see her defiant smile.

"Oh, is that so?"

"Of course. After all, I can tell you that for the very reasons you said, it should be the Uchihas who should surrender to the Senjus and be the defeated ones." she suggested before rising and pressing her red, fleshy lips against the Uchiha's, who reciprocated the act by initiating a deep, wet kiss that was followed by a fierce tongue wrestling match between the two.

Sasuke still had his cock inside her, so he decided to move his hips to grind the tip of his cock against the bottom of Tsunade's freshly fertilized belly, which made her moan and lose the upper hand in the dominance of that wet kiss.

But the Senju woman wasn't about to lose to a young Uchiha boy, so she wrapped her arms and legs around him and began squeezing the inner walls of her pussy to milk the thick uchiha shaft and pressing the nipples of her plump breasts against Sasuke's pecs.

It was only when the shortness of breath became something that could no longer be ignored that they broke apart, panting and with a trickle of saliva connecting their mouths. "So Uchiha? how about you be the one to submit to the Senjus? in exchange, I can make you my lover and let you please me and impregnate me from time to time. you are quite a handsome young man, so I'm sure you'll give me nice babies" she replied caressing his face with a palpable desire "Senju babies, of course."

Sasuke took a moment to look at the voluptuous woman beneath him. A very beautiful one in her own right. With a fine lineage and famous the world over. With round, fleshy tits that he was definitely going to suck on before the day was out and who was more than willing to bear his children.

A good offer, but an unacceptable one because it wasn't on the terms he wanted.

In response to her offer, Sasuke stood up and withdrew from Tsunade, leaving the length of cock rubbing against the moist lips of the blonde woman who spread her legs and arms without protest to let the young man have space.

"How about this?" Sasuke resumed his confident smile as he took his cock by the base and used it to give light strokes to the vaginal lips and clitoris of Tsunade, who shuddered with pleasure at that "a simple competition. Tthe first one to admit defeat will be the one who submits to the cattle clan".

"mhp, do you think you can beat me brat?" replied Tsunade with a confident attitude "I admit you have a very good dick, but just because I want to have your children doesn't mean I'm going to let you win."

"then it's a deal" Sasuke smiled, about to start the next round round.