Kushina x Darui

[Guest Kushina x Darui]

The Third Hokage created an alliance between Konoha and Kumo, because of this Darui was sent to Konoha as an ambassador.

The Third Hokage sent Darui to live with the widow Kushina and her son Naruto, and the reasons for that is that the Hokage wants Kushina to convince Darui into betraying Kumo and becoming their spy.

Naruto is happy that he has an older friend that doesn’t ignore him, Darui even told him about Killer Bee and Yugito.

A month after Darui moved to live with them Naruto notices that Darui stoped sleeping in his own room, instead he started sleeping in the same room as Kushina. 

Naruto being child he doesn’t understand that his widow mother was able to seduce Darui and made him betray Kumo, and in return Kushina’s become his wife in secret with the approval of the Hokage. 
So Naruto doesn't know that Darui is he step-father, and his mother is being fucked every night by her new husband.

kushina on the other hand doesn't mind that she married after Minato’s death, she is doing it for the village, and in return she also gained a young husband with a big cock and he is going to be the father of her future children.