Up until recently the only Sims I have sent on vacation have been Sims who live in the same household. I noticed though that when you book a vacation it lists lots of people who can go along. So I wanted the mother and daughter to go on vacation and bring along a friend of the daughter. I must have done something wrong. When they first got there it showed the friend off on a branch, that made sense, but I could not get her to do anything, even use the toilet. I gave up and tried to go to a community lot. She did not go along but was there when they got there. And finally I could have her use the restrooms, etc.. But when they went to leave, she didn't come. She showed up at home base, back to the beginning where I could not make her do anything again. So I just ended the vacation. Anyone know what the deal is with this?