I don't own any of the console versions of the game, but perhaps I can give you something you can experiment with until you get a solid answer from someone who does. It would be a good idea to save your game before you try this, so if it doesn't work you can just reset the game and try something else.
In the PC version, when you marry a sim before they move in with you, you can choose to move everyone into that sim's house instead of yours. When the "move" panel comes up, both sims will show up as moving into your house. If this move is the result of a marriage, you can use the arrow keys that you would use additional sims from the previous house into yours to move the two of you from your house into the previous house...at absolutely no cost (they already own it). In fact, when you marry someone, you typically get a cash bonus from wedding gifts.
This will only work if it's the result of marriage. When you ask someone to move in, you can't do this.
