Ben, just a word of caution. The jealousy thing doesn't often play out the way you think it will and in the end, why do you want to do something that you condemn her for doing?
To me, it sends the wrong message. Being the life of the party is one thing but doing things that would make the party "jealous" of you and a woman who is not your W, or make her feel like the "hottest girl there" seems like taking it too far. You can let W know you are ok and perfectly able to be on your own without giving her the impression you are "on the prowl" for someone else, especially her friend. It seems a bit on the revenge side and actually, how much of a friend does that make this woman to either of you to go along with this?
The best case scenario, albeit an unlikely one, is that W gets jealous and runs back to you before you go with woman X for good. That SEEMS like the reaction she'd have but in my almost year here, I have yet to see that happen after all the posts from men/women who've tried that tatic. The more likely scenario, or something like it, is that she calls you on this behavior and you are then forced to just let it be or defend yourself, telling her it was "nothing" or worse yet, that you were trying to make her jealous.
I just think in our cases, in sitches like ours, it's best to lead by example, not follow them into behavior we so clearly don't agree with.
After all that, don't sweat it, just think about it and decide if this is really what you want.
