She's making you jealous.. Of course she knows D will tell you. That's why she told her.
Remember.. these people are aliens. Sounds like she is definitely trying to hurt you.. pay you back.
My advice at this point (also.. remember the 24/48 hour rule) is to let it roll. By you not reacting, it will do a couple of things:
1. She won't get what she wants which is a reaction from you 2. Shows your D you are the bigger/better person 3. Gives W the impression that you could care less 4. Gives you peace of mind knowing you did the above.
Stay strong brother.. take solace in the fact he'll be gone soon.
