Here is what you can do and literally kill 2 birds with one stone.
Write up the whole email, be as factual as you can, include the pics sent to you, list everything he has been screwing your kids over for etc
Get all that anger out in a logical way in the email.
Then address the email TO THE COURT, and print it out to be put into your file for the next court date.
This way, the truth will now be in black and white (as long as you use black ink to print it and white paper, rofl)
This way, you will rid yourself of that 'self justified anger' to a degree and you will be able to go on.
This is all going to come back and bite him in his ass big time, unfortunately it will not be in yours or our time, but will be in HPs time and oh is he going to get one hell of a very rude awakening.
You did good coming here, venting here, and allowing others to take some of this current burden (of anger and rage) from you.
Sending you some extra prayers this evening.
Love and hugs,