While it might be challenging he might not want do harm his relationship by holding back for too long, even if he is having a hard time finding the way to express these words.
Introduction: Chapter 45Shouko's uncle and his wife, who are considerably similar to Shouko's parents.
He still ignores her so Hitomi assumes he has a communication disorder and Shousuke plays along.
A traditionalist housewife and kimono maker, who in spite of her demure and appearance, is doting, if a bit nosy.