Boundaries are set and enforced to create a healthy dynamic in all areas of your life.
Example: You stated how you dread the monthly bill talk with your W (who you have not lived with for over a year and is sleeping with other men) yet you where given multiple suggestions on how to change that. You chose not to set a financial boundary and instead you chose dread each month. Do you feel that is healthy? IOW you would rather be uncomfortable, nervous and on edge each month than set ONE boundary that could last a lifetime and remove the monthly dread?