I've been in the situation of Mary, sort of (no one was "taking credit", but I don't care much about such emotional concerns - pay me, let me do my job, I don't

I've been in the situation of Mary, sort of (no one was "taking credit", but I don't care much about such emotional concerns - pay me, let me do my job, I don't care). My action: I did the best I could for shareholders, including doing things that were blatantly not what I was hired for. When it became clear that it was going to be a long term task, I openly said I'd quit if I were expected to continue doing it.