Luna and Sithis had not had the chance to speak ever since she first broke free of Nightmare Moon.  But after many long years, the two finally got to talk to each other.  "Lord Sithis, it is an honor to speak to you after so many long years.  How have your duties in Mundus been?" asked Luna.

Sithis replied with, "My duties in the realm of mortal humans has remained relatively unchanged.  Recently, the last few members of the Dark Brotherhood made clones of themselves, and sent those clones to your realm of Equestria.  They all bear the mark of the Black Hand on their flanks.  I shall give you a mental image of their current forms in your world."  

Luna studied the image in detail.  Sithis was correct in that they all bore the mark of the Black Hand.  She was surprised to see that Shadowmere was able to speak in this world, and she seemed intrigued by the fact that Nazir still had his hood from his own world.  After seeing the image, Luna asked Sithis why he was in her realm.

Sithis answered with a question, "Are you familiar with a certain prophecy in your world?  It details that, when 9 bearing a mark of a hand come to this world, the princess of the night shall birth the child of an elder god from another realm, and that child shall lead the 9 with the mark of a hand as well as hear the voice of the elder god's bride."

Luna replied with, "I am familiar with that prophecy.  I have studied it in the royal library, in the restricted section.  Me and my sister were the only ones allowed to gaze upon that tome.  Even my sister's disciple, Twilight Sparkle, has been forbidden to gaze upon that prophecy."

Sithis was pleased to know that Luna was familiar with the prophecy; it would mean that she would have at least a hint of what was to come.  Sithis then spoke to Luna, "But what it doesn't document is who will play the roles of the elder god and princess of night.  Naturally that role of the elder god applies to me.  As for the role of the princess of the night...  I'll let you have one guess."

Luna was filled with a look of shock on her face, and she replied with, "ME?!  I AM TO BEAR THE CHILD OF AN ELDER GOD FROM ANOTHER REALM?!"  

Sithis would have had a smirk of amusement on his face if he had a physical form.  In response to Luna's shocked remark, Sithis replied with, "My, my.  You have a better understanding of the prophecy than I thought you would.  Yes, you are to birth my child in your world, and that child shall become the Listener of the Dark Brotherhood in your realm of Equestria."

Luna had tears running down her eyes, she had always wanted to be a mother, but there were no male immortal alicorns that she knew of in Equestria.  She had debated on having a child with a mortal, but she decided against it because of the pain she would have in seeing that child age and die before she did.  Now, she would finally have what her heart most desired.

She replied to Sithis with, "You have no idea how much of an honor and joy it is for me to bear your child.  One question though; how will you...  impregnate me without you having a physical form?"

Sithis replied with, "I will momentarily take physical form in your world and impregnate you in the conventional matter that your kind uses."

Luna replied to this with, "Well then...  I guess we'd better get started.  I shall be waiting for you in my bedchamber.  I'm...  looking forward to us pleasuring each other."  However, Luna had one more question for Sithis, "But what of the Night Mother?  Surely the Night Mother would be displeased for you to bear a child with a woman besides her.  She is your bride after all."

As Luna finished this question, she heard the voice of the Night Mother in her head, "I was disappointed when I first heard of this prophecy, but I realized that it would allow my will and the will of Sithis to be brought across the fabric of reality.  I shall speak to you on this one occasion only, for you are not the Listener."

Several hours later...   ((Sorry cloppers, I may do this scene as a separate fic, but I'm not sure.  If you would decide to make this unseen sex scene a clopfic yourself, then be sure to credit me.))

"That was marvelous!" said Luna, "I cannot express how pleasured I feel right now."

Sithis too was pleased after some exceptionally beautiful sex with Luna.  After Sithis left his physical form and left for the Void, he decided that he would make a copy of the Night Mother's body in Equestria.  Sithis then sent a telepathic message to Cicero explaining that the Night Mother's body would be copied and the copy would be put in the new Sanctuary in Equestria.  Cicero was pleased to know that he would resume his duties as Keeper.