Pretty weird on the timing of her getting her own account and changing the locks, but that could be a natural panic reaction to what is going on in her confused mind.
Today is one month of your separation. You have a lot going for you. You have a good shared custody, she misses the kids when she does not have them, she has some remorse towards what she is doing to you and she has not given any reason why she is a WAW. Give this time. You are doing the right thing by detaching, planning for the worst and hoping for the best.
