Remember roughenough, always end the call first. If you want to take things up a notch, let her vent a little and then tell her you have to go, you have something to do, and that she can call later if she wants. Don't be her emotional sponge, that's just one step short of pursuing.
Cutting her off is going to make her surprised, and potentially angry and frustrated, but more importantly, it will be a 180 and will make her wonder what it is that you'd rather be doing than listening to her -- and that's the kind of wondering that's going to work in your favor.
You took a step back by not pursuing. Take another step back by being less available. Think of it this way -- "if I'm not getting the love, I don't want the stress"
Accuray
Married 18, Together 20, Now Divorced M: 48, W: 50, D: 18, S: 16, D: 12 Bomb Dropped (EA, D): 7/13/11 Start Reconcile: 8/15/11 Bomb Dropped (EA, D): 5/1/2014 (Divorced) In a New Relationship: 3/2015