Mirror, Mirror

What if Sirius had the other two-way mirror on him when he died and Harry was able to talk to his godfather and parents though it? "Sirius Black? Sirius Black!" "Pads, is that your pocket talking to you?" "I dunno, but it sounds like...no way, it couldn't have been there the whole time...Harry!" T for swearing and a tiny bit of suggestive-ness.