Do you even think she ever is thinking of me or us?
Don't know, but it's not uncommon for a WAS to think about their LBS. Insofar as thinking about "us", it's likely she doesn't see the two of you as an "us" existing anymore.
Do you think that lack of contact encourages contact by W?
If they have feelings for you, then, yes, I believe it does. I believe it's true that in the absence of contact, such a WAS is likely to reflect and think about and miss the LBS, and also likely to wonder what you're up to, and then, especially, if their imagination kicks in, they give in to their impulse and call. Let her blink first.
