[she swallows. Hers is the face of a devout servant of the Emperor-as-Omnissiah who's trying to find the most diplomatic way out of this situation as possible]
Er. It isn't that I'm hesitant to show my devotion, or that I don't appreciate your foresight and generosity, but in the tradition of my homeworld, the Omnissiah's anointed adopt more subdued robes of office, rather than sackcloth. [this may or may not be true.] And, er, with regards to scourging—I haven't got much left to scourge properly, to be honest.
[she raps on her left shoulder with the knuckles of her right hand. Even through all the fabric she's bundled up in, there's the dull sound of metal]