Manda JO, you make an awful lot of sense – I’ll give the calm, reasoned approach a try in a week or two, when I’ve amassed enough data.
But…in the meantime, the job hunt starts tomorrow, because I really don’t hold out much hope. Human nature being what it is, no one likes to give up anything good that they’ve gotten used to having, even if it’s pointed out that they really aren’t entitled to it.
Casey1505, in my own defense, it was sort of like that old wife’s take about gradually boiling a frog – if you raise the temperature slowly, the frog accustoms to it instead of leaping out at once. Back when there were 8 women in the department, there were only three with children, two married w/o children, and three single. Having the mothers slip off to tend to crises wasn’t as big a deal: it didn’t happen as often AND there were many more childless workers to cover as needed.
All along the women with children haven’t been expected to put in extra hours. It’s been done that way long enough it seemed ‘right’, you know? Even to the non-mothers. That’s just the way things were. Because, honestly, I do understand that parenthood makes enormous demands on your time and energy. When it was a matter of having to put in a few hours, once or twice a month…well, no problem. Fine.
But, step by step, things changed. Personnel changes, additional births (and three children have three times as many activities/crises as one), layoffs…now it’s 4 mothers and 1 non and the water is bubbling up around me. 
So. As I said, I will speak with my boss and see if the situation can be fixed, but my optimism is easily contained.