User blog comment:Faimer552/Help pls!/@comment-3523404-20111128193913

If enough times passes, a message pops up saying, "Your companion has grown tired of waiting and returned home." (or something similar) They then end up in their usual home location, wherever that may be.

If you're playing on PC, you also have the option to use Commands. Just find your wife's RefID and type in this code: player.placeatme (RefID goes here)