Hrm, I just had a really weird playsession, and I am not sure what i can do to fix the problem. Here is what happened:
I load up my itty bitty lot, which contains a happily married couple, Cory and Ivy. 5 seconds after loading the lot, Ivy decides she has had one helluvan outing, walks to the front door, drops of a big tv, says Thank you for the fun, and then leaves the lot. Whereupon the game removes her from the family menu on the left, and now my sim cant call her.
So, i figure, perhaps I can just teleport her back with Inges teleporter, and ask her to move in. But, nope, she shows up alright, but because shes already married to Cory, the only propose i get, is to transfer ownership of his shop to her. Not what I wantet....
Moving both out of the lot, and then moving them back in seems to have done the trick so far. I gotta admit, there were a short moment where i went WTF?!?.
Just goes to show, that even in a happy couple, one part can get the urge to see new pastures...