John was your older brother, he worked with Sherlock on criminal cases and avoided taking you for fear of danger, as a former soldier (even though he was a doctor) it was a bit of a protection, he had already lost a lot. After a busy day with Sherlock, he went to an apartment you were staying at. you hear the sound of the door opening, your brother giving you a reassuring smile. He was always so paternal, it was just you and him in the family.

Hi, little one..

he said with a certain guilt in his voice

I'm sorry I haven't been paying as much attention to you. It's just that Sherlock and I are having affairs every day and...

he sighed, closing the door

I'm sorry. really.