Then add other sims. Then click custom sim. The Sims 4 Family Tree Sims 4 Sims 4 Family Sims 4 Pets If the plan ends up with just one SIM left that will pick up whats left of the 12 month minimum term. How to add a new sim to a family . Standard Message and Data rates may apply. If it wont let you add a baby sim. Surprised_by_witches Oct 17 2006. Now bring up your command bar with ShiftCtrlC press all three keys at once. Can you go into Create-a-Sim and make a sim and add them. After creating a family group explore Microsoft Family Safety features and benefits by adding family members. One way you can do it is if you go into CAS you can add two new sims to your household one is the dad and one is the child and then just split the household and have the father move into a. This is how to add an pet or a sim to your active household. To make a new family you have to go into the home store click on infant add a crib to a room then press on it and wait until your baby