Marcy- I know you to be a caring and attentive sissy who both follows through when.ordered to, and to pay attention to those orders.
But there obviously is no easy way to undo Miss Brenda's decision, incorrect though it is. I would suggest just getting through it, accept any punishment, and go from there.
The basic rule of your Mistress Is Always Right is in play here and you are smart enough to let it go.
Miss ATT