First you have to be close friends with some one. The first option once you do is to Create a Household. Rotational Play Multiple Households In Sims 4 Sims 4 Sims Play I used to this all the time. How to add random sim to household . You can have up to eight Sims in a single household. CTRL SHIFT. Second go to their house and ask them to move in. He lived in a dorm this time with several roommates. 3 increase your special lots ammounts BarDisco Museum etc. I added another sim and set its relationship to their mother and it automatically changed their relationship and then I deleted the sim. If you got testingcheatsenabled true on you can just get someone to your house and hold shift then click the character you want to add to your household and it should come up and option that. You could then create a sim movie or storyline where these sims move into a neighborhood and when they go to the park they notice something just isnt quite right about the small town they ...