Well, the game isn't finished and right now there are basically no connections between different stories, with very, very few exceptions. If you play, for example, Roxxy's story before Eve's or Erik's she'll still behave like a bitch, because those branches aren't connected yet. And there are ton of those cases. So in case you really care about those details it's probably better to really only play one single branch per playthrough right now. That said, the whole pregnancy thing is a topic on it's own. Right now the kids simply vanish after some weeks and it's like nothing has happened. We'll see, wether that's going to change or not.