Tbone, This is the first you have mentioned about receiving e-cards from your W. Has she sent these to you before or is this something she has started to do recently? If this is new, then I would interpret that she is replacing her "e-friends" with YOU. One thing is for sure, she is certainly thinking about you now when you are not together. This is positive! Try not interpret anything more into her action than that. Your speculations are introducing the negative vibes.
Each time you post, I see signs that her interest in you is being rekindled.