After one of my foster kitties go to their new home, I  call to check up on them a few times.  I always tell the new parents to call if there are any problems and to RETURN them if they don't think it's going to work out.  Anyway, when I called Midnite's new mom she said, "you're not calling to take him back are you?''  I laughed and said no, absolutely not.  I was only making sure everything was alright.  She seemed very happy and with him and that made me VERY happy!