they had already thrown the towel in on their marriage...so in this case, I don't think you can really say she "strayed", roadtester.
Perhaps technically people should wait until they have their signed divorce decree in hand, but in reality folks generally start to socialize and date before that happens.

And hapy...he married the woman and had kids with her. Must not of thought too poorly of her if he did that. Now their marriage is kaput and she maybe chose to have a relationship with another man (though as we've said much earlier, none of us really knows what happened here) -- so that makes her a slut?

The bias and slant you guys have is truly mind-boggling...