Either way works for me, as far as where they are in the relationship. Though it might be easier to have them already established and settled? I dont have anything like specific in mind to include right now. Im a bit more of an in the moment type of person with that. like all of a sudden I'll think "Oooh they should go on vacation to hawaii!" or "they should get a dog!" and what have you. and i love bouncing ideas around with my cowriter(s). I dont mind the pregnancy angle, Danger it could be fun! And something you definitely wanted to explore! Though that might be easier if they are established a bit already. Not that we wanna lead off with that, necessarily!