CT1118, as doodler said, you'll probably get different opinions on serving D papers. But most will say don't file for D unless you want a D. That should not be used as a tactic, because if you don't follow through you will be the ultimate plan B.
I will say this, LIM was not willing to be married to someone actively having an A, the D papers were served with the intention of getting a D, he wasn't using it as a tactic. I don't think LIM even expected her to stop the A when he served, it just happened to work out that way.
M - 9 1/2 years 5/5/16 - Bomb drop - 3 week EA 10/31/16 - We sold house 01/10/18 - D Finalized