Well you're right that it's best just to table things until the baby is born. That was very selfish of your H to push an S discussion and want to discuss custody, especially when S #2 isn't even born yet!! Try to relax as best you can, maybe go get a massage?
"I explained to H that this is not the time to discuss divorce and separation because the baby feels everything."
That was a valid thing to say, and if he tries to start a similar convo before the baby is born I would suggest just repeating this same thought.
