Dave, I know that the poop is catching; I've been that way myself at times. Sorry if my poop slinging has you down, buddy.
Here are my thoughts re: initiation. This is something that you have requested of W, and has nothing to do with what we are currently talking about on the board. If she is not following through, or even offering why she isn't following through, then I would say that it is perfectly acceptable to question her on it.
Of course, you MUST count her lame-o initiations, even if they were lacking in your eyes. If she has done ANY regular initiating at all since you have had this conversation then I would let it drop and let her improve her skills as she gets more comfortable. If all she is doing is making herself available after she had agreed to initiate, then yes I would bring it up and ask her what's going on. Good luck!