It sounds insane that she's out there making large purchases during these times.
Detaching is the BEST thing you can do. Once I got to that point I started to find myself again and be happy.
Insane or not, she's got her own money. It's her own risk.
I have detached short of physically leaving. Things took a 180 swing after months of "letting her go" and finally confirming that I will move out.
What I see now is her way of pursuing. She is making all these plans to hang out with family and "normalizing" the R like nothing is wrong. Buying the new car is just another way. I won't be surprised if the next thing is to start planning for winter vacation.
I have no business of criticizing her for any of it. I am suppose to be detached and not involved. What bothers me right now is that she may have not taken me seriously enough when I said that I would really leave her. Or maybe it did sink in and she is trying to down play it and watch my reaction. I have reamined calm and cool about it. No enthusiasm, but no resentment.
Sooner or later she would have to explain herself and that's where the next phase will start.