Grasshopper (did you get that reference?),

No - do not initiate. Your wife has sent out a very strong message that she isn't committed to the M. When she stays out too late on her girls night that does the same. I think the girls night out is also her "testing singelness." The only thing you should be fighting for here is a cease fire with the help of a trained counselor.
No 2x4 intended. You sound like a nice guy and I think if you keep holding your breath you may turn blue. Instead focus on becoming the kind of guy that you want to become for YOU. Read csw's old threads. He had a WAW and won her back and he did it not by focusing so much on her (she was busy pursuing OM) but by focusing on himself. Right now your wife has ALL the marbles. You need to have some on your side too. DON'T INITIATE. In fact, don't even call her while you are gone. Is it possible for you to call and speak to the kids without speaking to her?

All the best,

Karen