Newcomer, want to keep my hope alive!

[iwantittowork]

Ok, so another night of 'expect the unexpected'

I got home tonight, and the W's new car is parked out front, nice slightly used Nissan Murano. Wished I had the money for a lux SUV, while I am driving my 350k mile Honda. Oh well.

Unexpectedly, I am angry and somewhat disgusted just looking at the thing, so I put off some plans I had been thinking about.

I had planned on starting to hand her, her bills for Cell phone, etc tonight, but throw in the anger, etc emotions, and I don't think that's a good plan.

However, I want some of your opinions. I feel that it the right thing to do for me to:
Tell her I will no longer be paying for:
Her Cell Phone
Her Car Insurance
And I will be canceling the credit card I had given her for Gas.

I want to do this in non-emotional no spite, etc, way, I just do not feel they are my responsibility anymore. Now, I am also hesitant to do so, as I am pretty sure she will blow up, but I also know I can't respond to it if she does.

Thoughts? Knowing I want to keep my M going, but also knowing that she should be responsible for her stuff if she chooses to leave, etc, it still seems to be the right thing to do. Is this a bit of too much tough love though?