Reunion After Long Separation

My godson accidentally dialed my ex-boyfriend's phone number. His cold voice came from the phone: "You can do it!" "I haven't seen you for five years. You have a son?" "How old are you?" I looked at my godson and said, "He's four years old." The godson was anxious: "I am obviously five years old! Five years old! The teacher said I am a big brother!"