At the moment I have two sims that none of the household members have ever met, the only options are to introduce. They walked right into my sim's home, and have made themselves at home. One was playing on the computer, and now is watching TV, while the other is helping themselves to the leftovers in the fridge, and making themselves a drink at the bar. I don't have any Lot Traits for this lot. I don't know if this makes a difference or not, but this is taking place in Sulani. Any ideas why this is going on?