I would do nothing, or say nothing in regards to the PO. You did not file it, she did, why heck if anyone knows but her. Her issue not yours. If she knows the door is open, and subtle way to do this without talking about it might be wearing your ring if you aren't currently. Next is don't ask about the D. period. Let her make the moves, sounds like she makes all the moves also.
What 180's are in place, in other words what have you accomplished to make yourself less miserable to live with? Make sure they are still in full swing and keep them up. I know how does she know if you aren't around, well if they are in place then you won't have to "fake it" so much when you do have contact.
Married:10 years D final 8/28/08 10 minutes is all it took Life goes on and DB was no small part in growing from the Divorce!