Good morning, clolan, I am glad to see you have had lots more kind and supportive posts
here is the thread that MrSorry features in, as mentioned above
he is a man who did what many selfish, self-entitled people do but he takes responsibility for it and has some great insights into how someone on the receiving end should not accept it, and how someone who has done it should be acting in the aftermath
"Not Just friends" is also highly recommended, for you and your H to read
it will be difficult reading for your H, because the author pulls no punches about how doing something like this is due to the weaknesses, thrill seekiing and selfishness in the perpetrator and nothing to do with the marriage at all
I hope you managed to get some sleep, my love, and that if you are strong now, you find a way to deal with this that satisfies you (not him)