I definitely want to add pregnancy, but it wouldn't work out right now. Pregnancy has to be a part of the end of the game. And actually... Thinking about it more, it would have to be a thing you can do after you've finished every character's story.
Adding a simple if statement to look for if a character is pregnant is easy enough, but if you were to get, for instance, Kali pregnant, I would have to go back and recreate every event she's in to include her pregnancy. And that's a TON of work. Not to mention I would have to multiply that by each character. If you were to get Ashley and Kali pregnant, I would have to create a picture where only those two a pregnant, and a picture of only Kali being pregnant, etc etc.
So, unfortunately, there are only two possible ways for pregnancy to become a thing. A character either starts off pregnant, or you get a girl pregnant at the end of the game. Although I guess a third option is available, I could spend an entire update getting a character or two to work with pregnancy. But then that would just clog the update process even more. If I were to allow you to get them pregnant at any time, that would sextuple (Unintended pun) the amount of work I do each month.