Another plot bunny in the Eurstrade Universe... this is very much pre-Eurstrade but at this point, Eurus and Greg share a solid friendship bond. This is set after "The Adventures of Eurus Holmes" (which still needs one more chapter to complete it.)

Mycroft Holmes sat in the chair normally occupied by John Watson in the living room at 221B Baker Street. He reclined silently across from his younger brother, carefully considering, in his quiet, methodical way, how to approach the subject that had finally come into their horizon.

He had known from the start, when he first knew that his and Sherlock's sister Eurus had been leaving Sherrinford on her own, once per week and a day at a time, that this day would come. It hadn't quite arrived yet, but in his big brotherly instinct – though he insisted he was not prone to brotherly compassion – he knew it was near.

And, in spite of his insistence that if he had a heart, it was a very small target indeed, it pained him deeply to know what was coming for Eurus.

Blood was thicker than water. Even the deep waters that had haunted Sherlock for well over three decades couldn't wash away the blood connection of family. In spite of having erased Eurus from his memory as a child, in his own way of dealing with the loss of his best friend, deep waters could not wash away his sister, in the end.

Nor, it seemed, could the random unexplainable tears that Eurus suddenly found falling, out of the blue. She would be visiting with Sherlock or Molly, perhaps lunching with John and Rosie, at a matinee with Greg on the day off he had scheduled to accommodate her visit days and sneaking his popcorn in the darkness of the cinema, or even learning how to bake biscuits and teacakes with Mrs. Hudson, laughing with a joy filled heart… and the tears would suddenly start flowing in a random torrent of confusion and despair that she could no more explain than she could explain away the blue in the sky.

Her companion, whoever they may be, would place their arms around her and hold her until the storm had passed, and Eurus, in all of her embarrassed confusion, managed to resume whatever it was they had been doing before the weather hit, though with a more subdued mood.

Mycroft knew, though. The humanity that her illness had kept at bay for her entire life, and had been returning slowly and steadily, was suddenly approaching full force, as sure as the east wind, starting as a gentle breeze, benign at first, and gradually building itself up into an otherworldly gale that neither man nor beast could defend itself against.

It was a perfect storm, and Mycroft knew that Eurus would be helpless against it. He also knew that she would need every single one of those people she had drawn into her life voluntarily, for more than just a few hours at a time, one day a week.

"Our sister is approaching a crossroads, brother mine," Mycroft finally said, quietly. "I believe it's time for her to know that her activities have not gone unnoticed by me. The support she depends upon in the network she has built around herself will be crucial."

Sherlock sat silently, his hands in their familiar steepled position in front of his face. He gazed at his brother steadily, understanding all too well that Eurus was about to have an awakening, and it would either shatter her irreparably forever, or form the strong foundation that she would build herself upon for the remainder of her life.

"What have you arranged?" Sherlock asked, simply.

"Five day's leave from Sherrinford. We have just five days, Sherlock. We must make the most of them. Her entire future has come down to this. We must tread this road carefully, brother mine."

"Tomorrow is her regular day, as you already know," Sherlock said. "Greg has arranged his day off as usual to accommodate her, and I believe he said he also has the weekend. Molly is on her days off as well, and John has cut back his hours at the clinic to spend more time with Rosie."

Mycroft nodded. "Excellent. I have arranged a psychiatrist to be here on standby, but between them, us, and Mrs. Hudson, we just may bring her through the storm. Where she goes from there will be entirely up to her."