Now, the real work begins..Part II

[broke]

TimR and NYGal,

Thank you for your responses. I changed the unfortunately to however and here is the response I received:

Why didn't you tell me? You knew I would take S12 away. I specifically asked you 10 times what happened to other son when we were with the kid on vacation and you refused to address the question. (this is not true - I said we had to come up with the flights and vacation plan and then address it, which is what I was doing)

So, when he arrived to pick up S12 to take to his home for the evening, here's how our conversation went:

Me: I understand your frustration with the weekend of Spring Break.

H: I asked you over and over again about how we were handling things with the other son at home.

Me: I am sorry for the miscommunication. I thought we were talking about during the school week not the weekends.

H: Then, you handle the transportation for him back and forth.

Me: I am sorry but it is my understanding that was your weekend.

H: Fine, I will just get my parents to handle it. (Then he stormed off and got in the car to drive the boys back to his house).

Notes: 1) he is constantly changing his days with the boys and I have been very accommodating almost every time. In fact, I think this is the first time I have said no. Also, this precedent was set in our M when I put the kids before my H, my M and myself.
2) he has a worker that he can hire to drive him to and from this friend's house (it is a 3-hour drive back to our home town). He has done this several times before. Not sure why it is such a problem now.
3) I maintained my calm demeanor the whole time and never got angry.

So, what could I have done better?