You handled that great!! Good job betterm I think you are right on cue to put the 72 hour window into effect here. She is likely torn on her decision to file. She probably as friends or family pushing her to do so, but she may not want this in the end.
I don't want to "predict" too much, but I think you're right on with this. I know she spewed all of our MR problems to her friends and family and they soaked it up and fed it right back to her. I've read a lot about W's feeling "trapped" and so they don't know anything other to do than file for D. It's not uncommon that W's file out of pure confusion and influence.
Especially with her back and forth of leading up to this moment of "i don't want a divorce", "we have 60 days to resolve this", "i don't know what else to do, i feel like I've tried everything". etc etc. It's the common "trapped" feeling that forces a W to file.
However, I'm taking everything with a grain of salt during this. Her confusion, is not my concern right now, and I can't get optimistic that I can turn this thing around by influencing her one way or the other. All I can do is "do me" and if she thinks she has made the wrong choice before it's all said and done, we can talk about that when the time comes. But I don't think I'll be initiating any MR conversations.