Severus huffed. "So to business: What do you know about Sirius Black and how far are you in your investigation?"
"You assume we're investigating it."
"Don't be coy, Holmes."
Holmes shrugged. "Hard to conduct an investigation when you refuse to let us view the crime scene and scrub it down before you even let us know there was a crime."
"I see," Severus sniffed. "What is your child's status?"
"Five on the trauma scale. If it doesn't go down to a three by this evening, we're taking him to his old therapist."
"What is a five?"
"Persistent nightmares and insomnia, and accidental magic exploding objects in the flat on an hourly basis."
As though on cue, the human skull on the mantelpiece flew off of its resting place after a small localized explosion. Sighing, Watson scooped up the skull, which sported many cranial fractures, and placed it back on the mantelpiece where the mirror on the back was similarly cracked in many places.
"If that is a five, I shudder to think of what is a ten," Severus declared.
"You don't want to see it," said Watson darkly. "Trust me."
Severus huffed and took a sip from his mug. The tea tasted flat and almost sour to his palate, so Severus pulled a face. He had just enough manners not to comment on it, just the same way he knew better than to voice his sneering thoughts:
What a weakling; dwelling in sad memories and painful recollections like all those who can't control their emotions and put their heart on their sleeves…
"Shut up," growled Holmes abruptly, "You're wrong."
It would figure Holmes could read his mind without the benefit of magic. "What am I wrong about?"
"You think Harry is weak, mediocre and useless just like his father," Holmes spat. "You're wrong."
"Perhaps it is you who is wrong," Snape drawled.
"Please," Holmes sneered. "Your puerile attitude towards Harry is pathetically easy to understand. Humans are depressingly visual creatures. Even if your rational mind is whispering the contrary, your eyes tell you the child is the same as the father, and recalls all those oh-so-hateful childhood memories. Obvious. That you have never overcome those experiences are clear from your determination to catch Black and ruin Lupin. It's personal. It's about revenge. Again, obvious. There could be nothing else, not for a bully like you."
Severus did his best to hide any reaction against Holmes's cruelly accurate insights.
"And don't bother to deny it—it takes a truly dedicated sort of malice to make Jacqueline lash out."