If you want to let her know, why wait until after the D? What are your goals with doing that after the D? What are you trying to achieve? What do you want her to say? I think if you want to show her a person only a fool would leave, tell her before or don't tell her at all. Let her see you walk out of the court room with your head held high and chest open, the back of your head and body leaving her life 4 ever as a S will be the last thing she see from you on that day, don't look back.
If you try to initiate a convo about an A, after D it will make you look weak. IMO.
If it were me, I would let her know before the D and tell her if that's what she wants than you wont stand in the way of her happiness and move on. That convo will only suck you into a convo that will reveal answers you probably don't want to hear. And will having you asking questions that make you look like you are still pursuing her.
Onward and forward
M:37 W:37 T:11 M:10 S17, S13, S10, S4 BD:06/28/17 OM confirmed 07/20/17 Recon the M 10/29/17 Working hard:2gether
Onward and forward
This process is not a sprint it's a marathon! Patience, Patience, Patience.