golf mom, Here is my interpretation and I could be off the wall on this.
He wants you to know up front that he's filed and out of courtesy to you, wants you to know that you'll be receiving the papers soon. I also think he knows that he better let you know because he doesn't know how you will react if you were to receive them and not know about them. He doesn't want "mom" to go off the rails and punish him, etc.
As for his feelings changing, I wouldn't bet on it. Sounds to me like he wants to play the Mr. Nice guy role and say to others and also convince himself and others that he's been a great guy by advising you. I also think in another way, he wants to keep his toes in both pools just in case his fantasy life doesn't work out, he can return to you.
Don't put too much faith into this email...it's still all about him and most certainly he's not looking out for you.
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.
