Impossible to say for sure, but it is likely the reality of the D is starting to hit her as the summons deadline looms. It could be a lot of things, and since we do not do mind reading here, let's not start. As you said, just take it as a good day...which is better than a bad day.
Me: 42 W: 32 Married 7 years together 8.5 S1: 7 S2:7 Bomb #1: 09-16-13 Recon #1: 11/13 A discovered 04-03-2014 W filed D 05-19-14 but never served me I filed D 12-02-2014 S 05-31-14 Divorced 5-19-16