Welcome Wagon won't leave

Thanks everyone for the comments. There were 4 people to begin with and one left on her own. I reset the remaining 3 sims and with one I got an option to "ask to leave". That left 2 sims. I used the Mean choice with one sim and told her to "go away" which she did. But with the remaining sim even the "go away" option wouldn't work, so I'm temporarily stuck with him. This is the first Welcome Wagon that I've successfully been able to invite into the house. And that's only because I accidentally saw them coming up to the house and my sim was out on the porch ready to immediately greet them. Usually they get angry and leave because my sim lags a few seconds in getting to the door.