You are in a business notorious for balancing the budget by getting kind hearted people to pick up the slack. If this is a trend in your current job maybe it is time to move on and get a fresh start in a new environment. Don't let them guilt you into sacrificing your own financial well being. This impacts not only your weekly earnings but also your own health, future retirement benefits etc... You also have an Ogre to think about. It is a trap!
I wish it was that simple, my supervisor is on that shaky edge of quitting and the other person in the office is past retirement age. I want that job, something that won't happen if I leave. I am in line for the position and I really don't think I can get anything else resembling the benefits package I have now. At least not around here, I'm getting too old to be out looking for another job, let alone another city, state....