[ Without looking up, but with a hand blindly extended to briefly grip Sirius by the shoulder in solidarity: ] Fun isn't permitted where we're from. That's why he went to prison.

[ Making light of that feels wrong, but it also feels like it will move them safely and swiftly past the subject and into something less likely to cause headaches. ]

I'd have thought being an assassin without being a good liar would be a bit difficult.