If disabling the bubbles is not an option for you ( some movie creators use a cheat for that ) , then you'll have to resolve a problem with the ghost. Ghosts have a limited amount of bubble topics, usually just things related to their deaths. If you need to generate a specific bubble, you should use cheats common to movie creators. You can have the ghost think about a specific sim on command.
Thanks for that i just need my wife sim to show anger at my self sim getting married, i will have look and see if i can, Barry.