as the bio-parent in a step situation, I wanted to weigh in
I know that I react the same way when Cori disciplines our boys (almost typed my...does that clue you in to where she is coming from?)
It doesn't matter that he has,by far, been the most stable male role model in their lives...doesn't matter that he loves them like his own
because ultimately...they are mine...I am responsible
there is a level of resentment when he disciplines them, I have to admit...I cringe when I say that...
I feel guilt when he disciplines them...like I am his mom and I should be doing it...so it is hard, a struggle really, not to override any punishment that Cori gives them.
