It wouldn't be very in character for him to hire a sober companion himself, he clearly disliked the whole idea. I still lean toward Mycroft being behind her hiring posing as their father, and their father was the one that wound up responding to her last email. Maybe he found out what Mycroft was doing, disproved and intercepted that last email.
Also still hoping they'll genderbend Mycroft into Sherlock's older sister though idk what name they'd give her.
Also still hoping they'll genderbend Mycroft into Sherlock's older sister though idk what name they'd give her.