Sometimes people use the phrase "Do you want ___?" to threaten someone. For example, if your husband has been saying something that is making you angry, you can ask him:
Do you want to sleep on the couch tonight?
This means that you will make him sleep alone on the couch instead of in bed if he continues to make you angry.
People usually use this kind of threat with family members or lovers. It might be a little too harsh to use with coworkers or people you don't know well.