Well as of right now, the only one that even shows the "next step" route is Caroline and she's pregnant. I don't know if the other two girls in the house (Sara, Linda) will follow in their solo routes. No way to know unless the game is finished, and right now, that's asking a lot, and I mean A LOT and logically, only Caroline being pregnant in the "post-route" makes sense.
Sara still hasn't done vaginal and I doubt Linda's life will allow for it since she needs to work (with or without Bob in the house)