PP, he had one EA, or more (you used plural above)?
You can't ever KNOW for certain, you just have to make an informed judgement and then try to work on internalising it. But it doesn't seem to me that you can do that without having a neutral observer come in from the outside, ie. counsellor - most of all to help your husband work through the background/triggers to what he did. (If he's serious he will not object for a second.) And you can't do it either unless you feel that your H has told you EVERYTHING that you need to know about how and why these things happened and why he thinks it will never happen again. I'm hoping WhenwillIfeelnormal will come in at this stage and give you some of her brilliant advice. Every time she gets online it's like the heavens open and a shaft of light descends!
For my part, my husband's suffering has been far-out enormous over the last month, and that is what allows me to believe that he won't do it again. As he says - not with me, not with anyone else. As he also so says "I had to eat s* to know what it tastes like". It went so awfully for him (Psychobitch Inc.!) that to be honest , why would he want to do it again?! My head believes it, my heart - if we stay together - will need to do some catching up. He did this while I was back home for Xmas, and as another poster said to me, won't I be thinking about it all the time the next time I travel? Probably, yes, the first time, the second time, but then I expect it will get easier.
All that, of course, if I do decide to stay with him, which is far from assured. I'm not sure I can forgive.
Yep, it's pretty crap being in South America, not least because I come all the way down here, begin a new life just so that he can get his act together and then he does this to me! There is some slight advantage in that I have not yet wanted to tell my family (always dubious about the relationship, so plenty of humiliation involved) or close friends back home (if we stick together I'm not sure that I will want them to know as it may make social life very difficult). I have told a couple of new friends here who have been great to me (still not the same as age-old friends), and one friend overseas who I love but don't see too often and so whose attitude to H would not be too much of a problem. The biggest problem is, as I say, not being able to just chuck him out, which I would have done on March 2nd (D-day) if I had been at home. Not necesssarily definitively - I just need space!
Do you think you will be able to go for a combo of individual and couples counselling?