Hi McCone,
Welcome to the boards. The circular arguments you just described sound so familiar. It sounds to me that when your wife makes an accusation against you for something that you know you did not really do or that you had a good reason to do, that you begin to JADE. JADE stands for justify, apologize, defend, or explain. We have a saying here: Don't JADE. When we JADe our pwBPD may see this as invalidating their perception, emotions, etc. and that is what leads to a blow up. Grasping this concept has really helped me quite a bit.
Here is a link to one of our workshops on Don't JADE:
https://bpdfamily.com/message_board/index.php?topic=139972.0