This came to me while writing Ambulances and Italian so I thought I'd make it a sequel.
Molly was curled up next to Mycroft. They were watching a movie in Mycroft's movie room. His one arm was around her shoulders and his other was holding her hand. His fingers would occasionally brush over the ring on her finger. All of a sudden the screen changed to a video of a young Mycroft and Sherlock. Then it changed to a message:
I'M BACK
"Molly come with me. Stay close." Mycroft took her hand and led her to the door. It was locked.
"Mycroft, what's going on?"
"I don't know." The door slowly opened. Mycroft kept Molly behind him as he walked toward his umbrella. He opened it to reveal a sword.
"I knew it had to be a sword." Molly giggled.
"Not the time, Molly."
"Sorry."
They continued walking down the hall and were stopped at the silhouette of a little girl.
Mycroft
The voice kept whispering things. Molly clutched Mycroft's hand tighter. They chased something up the stairs. There was a clown with a sword.
"You can't have gotten out. It's impossible."
An East Wind is coming to get you
Mycroft pulled the blade off and held the handle of the umbrella. It was a gun. It didn't work. The clown came after them. Mycroft pulled Molly down the stairs. He saw the shadow of Sherlock.
"Sherlock, help me."
Sherlock whistled and the lights came on.
"Oh, sorry. I didn't know you had company over." Sherlock said.
"Sherlock! She's my fiancée. She's over here all the time."
"Anyway, experiment complete. Conclusion 1: I have a sister. Conclusion 2: she's been locked up in a secure facility since a young age at a place run by my big brother. Hey Bro."
"Sherlock…"
"Conclusion 3: You are terrified of her."
"You don't know what you are getting into."
"New information, she's gotten out." John said.
"That's impossible."
"She was John's therapist."
"What!" Molly said.
After a little more discussion, Sherlock walked out with one more comment. "Sorry to scare you, Molly."
John had one more thing to say. "There's a place for people like you."
"Where?"
"221B Baker Street. See you tomorrow." John left.
Mycroft turned around and saw Molly standing with her arms crossed. He couldn't exactly read the expression on her face.
"You have some explaining to do, Mycroft. I want an explanation of whatever that just was."
"Come sit down in the study and I'll tell you everything you need to know." Mycroft said with a sigh.
Molly sat across from him. "Go on."
"My parents had 3 children. I was the eldest. Then there was Sherlock. There's a 7 year difference between me and Sherlock. Then a year after Sherlock came our sister, Euros. We all have the natural ability of deduction. I of course considered myself the smart one. Sherlock, was not as smart as me, but Euros—Euros was brilliant. She was a genius, but it got out of control. She did things that were very not good. Especially when it came to redbeard." Mycroft said.
"Sherlock's dog? What happened?" Molly asked.
"My sister never told us what she did to redbeard. It scarred Sherlock permanently and turned him into the man he is today though he doesn't realize it. My sister was taken to a special facility to be watched constantly."
"But why all of this because of a dog?" Molly asked. "I mean I know it was special to Sherlock, but really?"
"Listen, Molly, what I'm about to tell you, Sherlock does not know and I hope he never knows. Redbeard was not a dog. Sherlock forgot about what happened. He's convinced Redbeard was a dog. I made sure he forgot what actually happened. Redbeard was the name given to a best friend of Sherlock's. Euros felt left out because Sherlock would not play with her. She pushed Redbeard into a well and drowned him."
"Oh my gosh! That's terrible. And she's gotten out? How is that possible?" Molly asked, totally shocked.
"It shouldn't be possible. Euros cannot be allowed out. It's dangerous." Mycroft said.
"Well if she's been parading around as John's therapist then maybe she was disguised as Faith Smith. That means she could have been in contact with me lately." Molly said sounding slightly panicked.
"Molly, I will protect you. I promise this will be over before anything can happen." Mycroft kissed her forehead. "I promise."
They went to their respective rooms, (Molly and Mycroft refused to sleep in the same room until they were married), and tried to sleep. The wind was rustling outside the window and Molly shuddered. She heard a voice whisper in the wind in an eerily taunting voice:
The East Wind is coming to get you
So I'm thinking of making this a series or a chaptered story. Give me feedback of whether I should continue or not. Thanks!