After the wedding Jesus went to Capernaum with his mother, his brothers and his disciples. This means his brothers were also at the wedding. The Disciples response to the miracle was to believe in Jesus (John 2:11) , but his brothers who also saw the same miracle did not believe in Jesus (John 7:5).
Many have experienced miracles and still do not believe. Unless God opens our eyes we remain hopelessly blind (John 9:39-41).
