Is there any mod that makes people walk when we talk to someone? Tbh is the main bug of Fallout and Oblivion D:
Not exactly what are you looking for, but you can try http://www.tesnexus.com/downloads/file.php?id=24677 from tekuromoto which make time pass when you do things (ANY thing). It includes an immersive waiting (A little buggy, and I fear it breaks some quests... not confirmed). In you specific situation, people walk when you talk to someone, but you still don't see them do it, simply the are teleported where they should be at that time of the day (or at least I understood so xD).
It's not exactly what are you looking for, but I thing it worths a try... Tekuromoto makes really nice mods