He slipped into old behavior patterns which are cruel and completely destroy trust.
When you lie about your drinking, you are probably an alcoholic.
When you contact the OW you had an affair with -- you're probably ready to cheat.
No need to try and find out what is going on. If you are intent on divorce, focus on you. Trying to figure our what's in their head has been rightly called "Untangling the Skein of F*ckedupedness" It's not fruitful to try. See if you can find this article online.
