I like what you wrote. He needs to understand that she's not going to be the taxi for any of these activities that he comes up w/on a routine basis, i.e., that he shares custody, therefore, on the days he has the kids, he's responsible for getting them to and from their activities.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
