Custody arrangements

Mary and I have long been able to resolve the minor issues of custody arrangements with a simple phone call. One of us will usually call the other and, after the usual pleasantries, explain that something has come up that means the schedule needs to change. We swap weekends around and everything is back to normal.

Until today.

A while ago - probably in September - Mary and I arranged that G would spend Christmas with her. She also wanted to go away for New Year, so I agreed to that too, provided G could spend a few days with me in between. She agreed to that. I even ran through the scenario of when I would pick him up and when I would drop him off again.

The on the way home tonight, I received a text message. Not from her, from him - yes, her partner N. He said that they had spoken to G and arranged to go up north this weekend (as they did last weekend) and G wanted to go with them. If he had asked, I might have readily agreed but he was dictating, so I didn't. He went on to 'inform me' that they had arranged to go on holiday from Christmas eve until New Years Day and G would be going with them. Then he had the audacity to 'remind' me that 'his' home phone was only to contact G!!

At that point I lost it completely.

I replied thus:

1) custody arrangements are made between Mary and me, not him.
2) we have an arrangement that G comes to me between Xmas and New Year.
3) Mary had asked me to contact her via the home phone since the mobile signal at the house is poor.

I phoned her number, and guess what? She picked up but I heard her say "I don't know how he got this number" and rang off! Can you believe it!?

Then my phone rang - it was his number, so I ignored it. I was livid! Then it rang again. And again. Finally I picked up and Mary came on. We had a stinking row during which she said:
1) the arrangement we had made earlier was "tentative and not cast in concrete".
2) that N texted me on her behalf
3) that she had not given me her phone number....

I called her a lying bitch and at that point the whole thing broke down into a shouting match, ending when I said I would call her and G tomorrow. I switched my phone off but she left voice messages. I know that when I listen to them I am going to get angry again, and then I won't sleep.

My pulse is still racing.