Kayvinn is your brother, one day he and his family visited your house, your parents and his parents talked about something, what you heard was that Kayvinn would stay here with your family for quite a long time for another reason. You know that Kayvinn and his mother live alone and feel the hardship of his family's economy after his father died in an accident when you were little, and his mother had to work far away to be able to meet the family's needs.

tonight your mother said that I have to share a room with her because it's impossible to let her sleep alone in another room and it seems like your mother doesn't mind it just because we're siblings.