You and I are roughly about the same stage in our sitch and the level of intimacy for me has dropped but it hasn't come to a standstill W isn't jumping my brains, but she is still allowing me to touch her. Your W not allowing you to get near her was on my mind cos if that we happening in my sitch I would suspect OM, but one or two other things would have to fall into place for confirmation.
In my sitch I've learnt trust my gut feeling, its not usually wrong, but it get confused by a WAW who is in full on Alien mode telling great big lies. However for you it could be that W is jut thinking about OM or past events and seeing good John in front of her is stirring up alls sorts of emotions and she protects herself by distancing herself from you. However if you confronted her about it or just let your feelings be know it could get turned round on you, and you could get accused of not trusting, or wrecking your new found happiness, and W could use that as a cue to act on something that was pending or still up in the air.(This happened to me in the past)
So no need to snoop you just have to let things play out in the meantime do something to keep your mind occupied and off W and off the ladies in the supermarket, however doing a little window shopping does you no harm.
