2 months have passed by since the Royal Sisters met the Dark Brotherhood, and now the Dark Brotherhood has made their presence known all across Equestria.  Luna and Celestia were having breakfast together, and something about Luna was puzzling Celestia.  To bring it up, Celestia said, "Luna, have you put on some weight?  I think you have gotten slightly bigger these past 2 months.  Maybe you've been having too many sweets?"

Luna replied with, "I do not think it is that Celestia.  Perhaps we should do a medical test on me."

Celestia questioned why Luna would want a medical test on herself, but Luna insisted that Celestia do it anyway.  Celestia used her magic to perform a medical analysis on Luna; and the results shocked her so much that the glass she was drinking from was shattered to bits by her grip.

"THIS CANNOT BE POSSIBLE?!" thought Celestia.  The shock caused Celestia to scream.  After she stopped screaming for 3 minutes straight, using the Royal Canterlot Voice, she said, "YOU'RE PREGNANT?!"

Luna had a visible smirk of amusement on her face to her sister's reaction.  And, using the Royal Canterlot Voice, she replied with, "YES IT IS TRUE!  I AM GOING TO BE A MOTHER!"  From the fact that Celestia knew she would be an aunt, and that Luna used the Royal Canterlot Voice to confirm it, Celestia fainted.

When Celestia woke up, she had two questions for Luna, "How did you get pregnant, and who got you pregnant?"

Luna replied with a clever story she had come up with, "It was HORRIBLE!  I was royally RAPED by that nefarious Prince Blueblood!  He must have thought that if he had a child with me that he could rule all of Equestria!"

Upon hearing this, Princess Celestia's left eye twitched, and her normally snow-white coat turned a very angry red.  Using the Royal Canterlot Voice, she said, "THAT NEFARIOUS ROYAL BASTARD!  NO ONE RAPES MY SISTER AND GETS AWAY WITH IT!  I WILL PERFORM THE BLACK SACRAMENT AND CALL UPON THE DARK BROTHERHOOD TO SERVE JUSTICE UPON HIM."

Luna was shocked to hear that Celestia wanted to call upon the Dark Brotherhood, but she agreed with her sister on that Blueblood didn't deserve to live.  They spent the night gathering a skeleton, a pony's heart, pony flesh, and 5 bushels of Nightshade.  Celestia proceeded to rub a knife from her kitchen in the Nightshade and stabbed the Black Sacrament that was surrounded by candles while whispering "Sweet Mother, Sweet Mother, send your child unto me for the sins of the unworthy must be baptized in blood and fear."

Meanwhile, thousands of miles away, Twilight has been telling Spike to read "A Kiss, Sweet Mother."  Spike was confused as to why Twilight was obsessing over him reading this one book, but he chose to read it anyway just so Twilight would stop nagging him about it.  After reading its contents, Spike had the compulsion to vomit.  He chose to take a nap in his basket, but unknown to him, Twilight had taken him in his sleep and took him to the Dark Brotherhood Sanctuary.

5 hours later, Spike woke up, and he was terrifired to see that he was in some kind of cave with no way out.  Staring at him in the eyes was Astrid in her Dark Brotherhood armor.  "it's about time you woke up." she said.

Spike was soaked in his own sweat from his fear of the mare in front of him.  He wanted to know where he was, but, before he could ask, Astrid said, "I think you will find that unless you decide to join us in the Dark Brotherhood, you'll never see your precious little Rarity again."

Astrid's words stabbed at Spike's heart, how could he let his beloved Rarity be in danger from the Dark Brotherhood?  Spike said, "Why me?  Why do you want me to kill innocent ponies?"

Astrid smirked at Spike's fear, but the smirk was hidden by her mask.  She replied with, "Our Brotherhood has only been in your home of Equestria for 2 months.  We only recently came over from our world of Tamriel, and we want to spread our influence here.  And by the way, you wouldn't be truly killing innocents.  You would be killing ponies, changelings, dragons, and griffons that ruined the lives of the innocent.  It's just simple business.  Think what you could do with all the bits you earn by killing for our Dread Father Sithis."

Spike felt both disgust and interest at the same time.  He was disgusted by the fact that the Dark Brotherhood dismissed their killings as "simple business" and "justice", but he could not deny the fact that the bits he would earn would help his life and make it so he could purchase objects to help Twilight and impress Rarity.  After a moment of deep thought, Spike said, "Very well then.  I'll join the Dark Brotherhood."

Astrid then replied with, "Welcome to the Family, Brother.  I'll give you a little tour of our Sanctuary.  You'll find no safer place in all of Equestria, so get comfortable."

Astrid then proceeded to take Spike to the chamber in the Sanctuary that had a stained glass window depicting Sithis.  It looked something like this:  

In that chamber were the other members of the Dark Brotherhood.  Spike recognized all of them as the 9 new ponies that had arrived in Ponyville 2 months ago.  When Spike saw Twilight among their number, his mouth literally dropped to the floor in shock.  "TWILIGHT?  YOU'RE A MEMBER OF THE DARK BROTHERHOOD?"

Amused by Spike's reaction to finding out the truth, Twilight giggled out loud.  Spike was about to tell Twilight that he never thought she would become a murderer, but he felt a feeling that he only got when Celestia was about to send him a letter.  However, instead of the usual scent of vanilla he got from the Princess' letters, he recieved a scent of rotting flesh.  Astrid asked Twilight why a letter popped out of Spike's mouth, and she replied with, "Spike usually does this when he gets a letter from the princess.  Usually the letter has a scent of vanilla, but this one has the scent of rotten flesh.  That spell I developed actually worked!  Before you ask, I thought of a spell that would automatically make a written request to meet with a person who wanted to contact the Dark Brotherhood and have that request sent through Spike.  It's only until we have a Listener, but it'll be just as effective."

"Very clever of you Twilight," said Gabriella, "Even I would have never thought of that.  Well, let us see who wishes to have audience with us."

Meet me at the road near the Everfree Forest at 7 P.M. tonight.  I wish to give you lot your first contract, and I can assure you I will pay well.

After reading the letter, the Dark Brotherhood had to decide on who would accept the contract.  They proceeded to argue for half an hour on who should get the first blood for the Dark Brotherhood in Equestria when Shadowmere proceeded to shout, "I WILL TAKE THIS FIRST CONTRACT!"  After a long discussion among the members of the Dark Brotherhood, they all agreed that Shadowmere would take the contract.