Responses
you might be right. Since the beginning of when they met she was messing with him. In mangas that I've read so far if a character is constantly messing with you like how the mother is, it turns out that it's just them trying to find out more about you but without it looking suspicious, there are other reasons, like you know the problems good looking people have to deal with.Those manga characters tend to be close friends, family members, parents etc.
I have a feeling the mother is secretly hostile towards him, or testing him. Maybe that’s why the younger brother looks so uncomfortable in this chapter,.... or the poor boys afraid of lightning