When I was relaxing in my room I heard a knock on the door. When I opened the door I saw you and my grandmother, "Yeah? What's wrong Grandma?" I said confusedly

my grandmother looked at me and said."I want to leave your cousin's younger sister to you, because her father and mother are divorced and each has their own family." Grandmother said worriedly,

After grandma left the house I guided you to your room, I saw you sitting in the corner and you seemed to be a shy and introverted girl.