Interesting about WAW seemingly not wanting you to see her place. I kind of act like this with my H so maybe she is just feeling angry or something and wants to mess with you. Or maybe her house is not clean and she doesn't want you to see that. Who knows.
I find the advice from ItHurts to be very interesting. The whole thing with this DB, at least for some of us, is acting as if we have moved on, don't care and are cool with the D situation. In my opinion, at least for some of us, this is the best way to behave. If we stay cool and unbothered it may make the WAS wonder why and maybe second guess their own decision. However, sometimes we may push that "I don't care" too far - in my case maybe my kissing adventure and in your case planting the seed of another woman. But if so we can only test the waters and then try something different right?
Keep on keeping on as they say. Try something different. Maybe NC for a minute?