Six months later, Des is given a clean bill of health.
"Yes!" she exclaimed before running around the outside of the compound doing flips and cartwheels to show her exuberance.
Mycroft chuckled as he watched the thirty-five year old woman show her happiness in the most physical way possible.
That evening, she wrote a letter to John claiming that she'd been stuck in a bad place, very classified, and wondered if he wanted to go out for drinks.
Hello again Captain Watson,
I'm finally out of the classified hell-hole that my boss put me in to recuperate, but I'm finally 'good to go'. I know you live at 221 Baker Street, so I will meet you at five today (the day you get and open this letter, and yes, I'm that good) and we will go out for drinks tonight.
Sincerely,
Classified Female Agent
When John received the letter, he was surprised to say the least. He looked at the clock and saw that it was almost four thirty. He was putting on a new jumper and jeans when he heard the knock at the door. "Mrs. Hudson, would you get that?"
A few minutes later, he was ready and walked into the sitting room.
"Hello, John." A voice said from behind him.
"Jesus!" he exclaimed as he jumped. When he turned around, there was a blond woman sitting in Sherlock's chair.
She smiled as she threw back her head and laughed loudly. "I didn't know you would be that easy to startle." she said once she stopped laughing.
"John? What is that god-awful racket?" Sherlock said as he came out of his bedroom.
"Sorry, I surprised John and laughed at him." Des stood up "The name's Amanda. Amanda Blackhouse."
"No it isn't. You are a secret agent for our government, and I'm guessing seven months ago, you were in Afghanistan and you coming here means you are fully healed and want to take John out for drinks."
"So far, so good. Go on, try to find something that not even your brother knows about me, Mister Holmes."
"You are the oldest of three, but at the age of two, possibly three you were taken by our government and moulded into the best of the best in the business. You keep in contact with one sibling, but he doesn't know who you are." he saw her glance at John, then down at the floor "Oh, what's this?" he smiled and turned to John and said "You have quite the interesting eldest sister, John."
"Stop it! That's CLASSIFIED!" Des yelled at Sherlock while he talked to John.
"What?" John said, floored by the sudden revelation.
"I-I-I better go." Des looked around, panicking. She turned to run out the door when John grabs her hand.
"Wait, answer me one question. Are you the person who sponsored me and Harry all through our schooling?"
"Yes, now I must go before Mycroft comes and takes me away. God, I was hoping to lead into the thought of me being your older sister after a few drinks, and explain it to you once you were drunk so you would only have vague memories of me telling you." she began to cry quietly.
John pulled the short woman into a hug and said quietly so she could hear "I am so proud to have you as a sister. Stay with us for a while. Let's dry those tears, and go out for drinks like we planned. Ok?"
She nodded, and smiled at him before turning to Sherlock. "This is for spilling Classified information." She swung her arm and punched him squarely in the jaw. "Come on, John. We have a lot of catching up to do."
John looked at his flat-mate with a mixture of concern and amusement. "You deserve it, you know." He shook his head and walked out of the room and followed his sister to the cab outside of the flat.
Sherlock moaned on the floor, before finally getting up and put together an ice-compress. As he nursed his bruised jaw, he decided that he liked John's sister.