I would say if that is what you really want. You have to be honest with yourself. If giving her the money is only a ploy to getting her back, then she will see right through it, and you will feel angry and manipulated when it doesn't work out the way you planned.
I guess i'm waking up to the fact that all of this doesn't work until it stops being a game.
So if you honestly feel like you want the best for her, and giving her the money won't hurt you or make you feel manipulated, then that is your call. Everything is perception, if you are happy with the situation than you won't care what the outcome is. But if deep down you feel this is a move that may wake her up, forget it, it won't.