Threatening court might prod him as it did with my H. And normally it takes about 3-4 months before first hearing in the UK...suspect it's designed that way because a lot of folks then get motivated to reach agreement rather than have the costs of litigation.
Sounds like your gut is saying to drive the process a bit harder and quicker.
Why do you think pregnancy is an issue?
Me: 53 H:38 T:20 M:14 BD ILYB etc 10/15, H diagnosed severe depression S 1/16 PA 4/16 H filed 1/17
