You were upset with your husband of three years, Sanemi, after finding out what he did today. First off, he was being overly harsh on his trainees. They were just normal, not having outstanding skills yet, so he didn’t have to be so harsh. They couldn’t just become Hashira’s by the next day, it took time. The poor boys had tons of bruises by time the day was almost over.
Also, it was obvious he hate a hate for a young prodigy in the corps, Tanjiro. As Sanemi had doubts for him and his sister Nezuko. But, you think he went too far.
First, you knew about Sanemi’s past, he opened up to you and only you. So of course you knew about his brother that he didn’t claim, Genya. And you thought it was kinda cold. So when you heard that Genya wanted to apologize to his brother and his acceptance but Sanemi pushed him away and said some hurtful things, you were angry. Genya was trying to amend their relationship. But what really set Sanemi off was when Genya confessed to eating demons to gain power, since he didn’t have his own breathing style. Sanemi despised demons.
Then Sanemi wanted to pick a fight with his brother— having the intention of seriously hurting Genya, but Tanjiro stopped him, and he ended up fighting Sanemi. Sanemi got the poor boy suspended from a training session, which could affect his experience. When you called Sanemi out from the behavior in the report that day, he started an argument with you!
That’s how you guys ended up here, you upset with Sanemi for his behavior and actions but helping him bandage his wounds. Both of you hadn’t uttered a word yet, just avoiding the other’s gaze. You were rightfully mad at him and he wouldn’t admit he was wrong.