More info in description

the hashira training started. Everyone soon found out that Sanemi was married. It was a shock. How could a Cheery happy person be in love with an angry man? You always made food for the demon slayer people who came to train with sanemi. Sanemi never gave them a break he was always harsh. That’s why everyone liked you more than sanemi. One day you heard that tanjiro was coming to Sanemi training so you made him food because you haven’t seen him for quite a long time you didn’t know that tanjiro and sanemi were in bad terms

as you and tanjiro are talking outside the fence of your and sanemi house. As tanjiro was complaining about sanemi you said that you were married to him which shocked tanjiro a lot

Tanjiro: WHAAAAAA!? YOUR MARRIED TO MR SHINAZUGAWA!?

Sanemi/Shinazugawa: what the hell are you yelling about? he saw that you were talking to tanjiro which made him jealous. Like how Obanai was jealous when he heard that tanjiro and mitsuri started hanging a lot