Hey! Are Sims using birth control? Maybe birth control pills are still active and you need to give them a little bit more time for them to be removed from the system? Sounds like you're using the Simple Mode, if WooHoo is between NPC Sims, did you increase the NPC Pregnancy Chance as well? Are both Sims configured appropriately in CAS, so one can get pregnant and another impregnate? Is there space in your household, as the max is 8 Sims? Are the Sims ghosts or servos?