I'm really starting to suspect OM. I've done some snooping and haven't seen much to indicate such though. Found one thing that indicates a flirty facebook exchange from a few months ago (on our 10 year anniversary noless), but I have accounted for nearly every evening that she has been out since then (sans the recent late night "walks").
Accounted for nearly every evening....???
Her having an affair couldn't be more obvious if she sent you a picture....
She is in the midst of an affair. GUARANTEED.
THAT is the reason that what you are doing isn't working or going to work. First you need to smoke out that she IS (and she is) having an affair and then regroup and change your gameplan. She won't respect you until you show her that you weren't born yesterday.