Hard to tell whether Steerpike's been affected - he likely had an ordeal of his own, but that's one thing he's unlikely to discuss with anyone, let alone Titus.

And that's why he wanders down to the kitchen for some food to steal from the fridge, probably at a time where Titus is conveniently alone.

He's grumpy, and will blatantly ignore the annoying earl, for now.

See where it goes, for now I'm settling for passive-aggressive behavior rather than full out animosity. >.>