Before Stannis says this Brienne tells him she was a Kings guard to King Renly. Whom she is convinced was killed by Stannis. So now you're gonna tell me you really think the "duty" stannis is referring to is that of rescuing Sansa???
Doggy are you high?
And how would Stannis know about her having an oath to rescue Sansa anyway?? If you're saying Stannis means for her to rescue Sansa by "your duty".
I didnt say Stannis was referring to Briannes rescuing Sansa.
Stannis saying that could have snapped Brianne out of her Revenge Renly bullshyt, shyt has changed since then as per the example I gave.
her duty now is to rescue Sansa, shes fukked up everything else, Stannis could help, at this point killing him for some shyt she knows nothing about is foolish.
Of course she could have chopped dudes head clean off his shoulders, we know she got the steel, but as we didnt see that in a tv show that has a decent record of main characters getting decapitated at least once a season, I figured he was alive.