One of the unsung advantages of divorce is, of course, the occasional bit of free babysitting done by the ex. But, as I now have stepchildren as well, and as the TWO exes schedules are hard to juggle (yes, that’s a euphemism), we rarely find ourselves with child-free time. Except this week! Obviously, we miss all the children terribly. But it is very nice not having to finish my crusts when we have a sandwich. Setting a good example at…