You find out something else

While it has no consequence to the mission, you find out that Inari's father didn't die shortly after Inari's birth. In a surprising twist, he was still alive, wasting his time in a bar trying to pick up ladies. According to what you find out, the man was a womanizer who made Tsunami one of his many conquests, and the two had sex many times until he got her pregnant. Then, faster than a bowl of ramen in front of you, he made himself scarce by running away, letting her deal with the aftermath.

It seemed that the Wave's improving situation and Tazuna family's increased prestige had convinced him to return to the country. From what he was boasting in the bar, Tsunami was a slut that would gladly spread her legs anytime he asks her. The expression on everyone's face was full of disbelief, but the man, offended by the responses he got, promised that he would go and fuck Tsunami to prove his claim. The man sneered, saying that maybe he would bring and fuck her in front of everyone in the bar just to show what he said was true.

You're pretty sure that Tsunami was not a slut, despite what the two of you did last night; the man was lying. But, there may be some truths in his words. From what you knew, Inari's father, Tsunami's husband supposedly died shortly after Inari's ****. Maybe that wasn't the case and Tsunami and Tazuna had to lie to Inari because his father was a scumbag.

Further investigation corroborated your information.