I don't see anything escalating, or any cause for alarm, but I agree with everything you've said about what MB should do.
btw, I think my wife said about 8-9 of those things on your list to me during her affair!
Puppy
My concern is that based on my readings, if the affair isnt' fought well the abandoned spouse gets into an addictive cycle of their own... rather than combatting addiction they become a slave to it...
I dunno... its worrisome.
And ya, I imagine that list is pretty common to everyone here.. addicts love their scripts.