I'm glad you decided to post here. Here is my opinion on what to do for the courts (again, while I am a lawyer, this is not legal advice but my personal opinion):
Im trying to avoid doing anything that would reflect poorly on me when we have to go to court if we can't resolve this on our own.
1) Keep any written communication civil and to the point. Don't get into name calling. Don't get trashy.
2) Keep all communications in writing to the extent you can - and if you are talking on the phone explicitly state you are not okay with being recorded AND keep things even more civil and to the point
3) Ask what he wants for visitation and when, and say that you need a schedule due to having to work etc - ask him what he wants for a schedule first - explain it cannot be "on the fly" as you have things to take care of etc.
4) Remain calm, collected, rational, and above all else, civil.
5) Don't talk about the affair/the AP/and don't name call - it just gives your WS's counsel ammunition to make you look like an unhinged lunatic - remember, most people, judges included, do NOT see affairs as the mind-wrecking soul-crushing disaster they are - until you have been there you can't understand - go into all of your interactions with the mindset that someone who does not get it is going to be reviewing your case and your communications - who thinks affairs are something you get over in a month or two - and play your behavior towards their review
Something like this:
How much do you want to see the kids every week? We need to come up with a schedule as we both have other commitments.
If he will not answer, then suggest one that works for you. If he wants something crazy (aka not willing to work with you - he wants anything he knows you can't accommodate) then again, suggest a schedule that works for you. If he flips out, do not take the bait. Reiterate the prior schedule, or suggest something else that will also work for you. If he refuses to set a schedule then, repeat - suggest one that works for you and add that you are willing to work with him on one, if he will suggest one. If he suggests something that won't work for you, explain why as succinctly as possible, and try to come up with alternatives. Etc. If he is being reasonable, you may have to compromise. If he refuses to set one at all - give him alternatives and tell him that you welcome talking to him and coming up with something that works for both of you, but until then you will proceed with taking care of them. Say you are open to working something out, but your kids need consistency, so you need to come up with something consistent. This is fine - your kids are the top priority. If he won't - keep making reasonable suggestions - but do not become the doormat. The court does not expect that of you. They expect reasonableness - someone who is putting their hurt and anger in a safe and locking it away for the sake of their kids.
If there is physical abuse towards you and/or your kids - that is different. You have not mentioned that (in what I have read) - if that is the case, a whole different set of actions is required for you.
The legal standard - the one courts in almost every jurisdiction I know of (in the US) will all look to is "The best interest of the child" - what is in their best interest? If you are civil, reasonable, and establish you are trying to do what is best for your kids that is the best you can do.
SHORT quick texts are a good way IF you can keep it reasonable. And save them - every last one of them - and presume that he has as well. If there is anything you have said in writing in the past that is negative/looks bad - you can't change that now. What you can do is change today - so that if presented with that in court you can say "Yes, I did say that - I was hurt and angry and not thinking rationally because of our history. But I have calmed down now - as you can see from my communications since [today's date] and I have put those things in the past because I need to for my kids..."
The goal is to establish not that you will do anything and everything that he wants - but that you have behaved REASONABLY. Do NOT try to exchange time with the kids for $$ (e.g. You aren't seeing X & Y until you pay me child support/grocery money/whatever). Don't say he can NEVER see them either.
No court is going to blame you for being reasonable. The more unhinged and unreasonable he appears - especially in light of your reasonableness - the better. (And yes - it is HARD to be reasonable with someone who is a complete and total ass - so remind yourself of your kids every single interaction with him).
[This message edited by ThisIsSoLonely at 7:23 PM, Tuesday, April 19th]