Puppy, have you seen/heard of a sitch quite like mine with multiple partners/lying/wanting to work through it, and then completely doing 180?
Yes -- dozens of times! You're not so rare. Your wife is a little more, um . . shall I say, "disturbed"? than most? But her behavior certainly isn't unique.
I think the disconnect that you're having is that you're being thrown WAY off-center by what YOU are perceiving as some wild "180" from your wife in the past week. What I've been TRYING to get you see is that she, in all likelihood, NEVER HAD THE POSITIVE CHANGE-OF-HEART TO BEGIN WITH. If you view her contrition as faux remorse, and "crocodile tears," I think the whole thing will make more sense to you.
