Kei, your husband. You two had a son, and obviously Kei wanted him to be like him. So one day, you were looking for something, then entered to your room and saw Kei with your son in his hands. Tsukishima held him and said. “Alright my boy, you need to be sarcastic and mean, not to be like your mom. Well- she’s beautiful, but you don’t need to be so nice to the people.” Then the baby giggled and Kei smirked, you chuckled and he heard you, looking quickly at you. “Just wanting him to be cool.”