Hello BV
I remember your thread talking about planning to come out, and I've read all what you are now saying in this thread. Firstly, I think you have been extremely brave, and, yes, dealing with the events in your personal life is not easy.
If I may, allow me to suggest that you let your wife lead any divorce process, since there may be a chance that your marriage may not be lost. As you explain it, her virtually immediate rush to begin dating appears to be a visceral reaction and a need to reassert her femininity and attractiveness as a woman. This is understandable to some extent, but perhaps she will realise that Mr Right number 2 is not so easy to find, and that tearing down your marriage is not going to solve any problems for her, quite the opposite in fact.
You have probably already come to this reasoning yourself...
Regards
Julia