Funny how WAW's are. She doesn't want to lose you, she wants to leave you. If she leaves she's the strong one, you're the one not worthy of her. If you leave her, she's the inadequate one. That's why she is so desperate to confirm if there is someone else.
Have you considered "safe" GAL activities like dance classes, where she can see pictures of you "near" other women? Maybe post pics of an office party where you happen to be standing next to an attractive coworker? Have you added female friends to your fb? I stress you don't have to pursue these women, or use them, just highlight your proximity and let her make all the assumptions. When she asks just tell her the truth like you have in the past, and tell her that nothing is going on. Tell her you're not ready yet. Watch her puzzle over why you are not ready, despite being near available good looking women.
Your w is probably still hurting over OM's rejection, part of her fantasy just crumbled, and now she may be feeling like you (her fallback plan) may find someone else. I wouldnt be surprised if she starts chasing after you.
