Reason that I call her sister

a stranger suddenly rushed in, one a brother, called me very uncomfortable. reason that I call her sister, but she seems to the words: ; end also added a naughty picture. This girl will sick ah, a brother up call? I was wondering child, the screen has flashed: ; I do not even know your name, how do know you well? symbol middle name of a you. ; reliable, however is the leaf-ling! Where to?