Qunari are very attentive. Sten would surely notice if even it happened in the blink of an eye. He would say 'Kadan, we will never speak of this again, but that was an interesting strategy'. Or something similar.
My first impression of the King was that of a [...] fan boy who'd read far too many about the Grey Wardens, but he was ever so endearing. I should have known Alistair was his half brother right there and then.