OK so here is where I am at...

the whole question of exposure...

at this point, the A is still a big secret due to the fear of H losing his job, which really would cause us extreme financial distress... as in almost immediate crisis.

H has a job in which it is quite likely he would lose it should this be exposed.

Yet...there really are no consequences yet for H or OW. Yes, H is making some small signs of progress as in my above posts. This is quite new and fragile, and I don't want to do anything to set that back.
But... because H is still not willing to fully commit to the M and is still struggling and confused about feelings for OW, I know they are still in contact. She continues to do PT work where my H works, and my H indirectly supervises this. There are some ethical issues there as well.

Do I put all this on the back burner longer and focus on my own DBing and the baby steps of progress with H and M?
Or, is this the time to do that, but also begin to consider exposure?
I really don't know, I feel torn. And, I am afraid of the financial picture if H lost job. I would appreciate thoughts on this...