Deployed Soldier/Father needs your help

[SoldierDad]

Ok, W just e-mailed me with this:
You cannot stop payment on my car H, its in your name you will only hurt your credit, and since we are not divorced yet that is a bill and you are responsible for it the car payment has to be made

Here is the deal. I did not stop payment on her car, the bank did, due to NSF. I am NOT responsible for all the bills-just the mortgage by Military reg. Yes the car is in my name. I told her when she started all this that she would be responsible for HER car. I am concerned about my credit, but it is her car. Thoughts?