Fantasies and desires are not abnormal. But just like any other needs that we have, they have to be properly managed. Talking to other people may become a matter of concern if you are having to do it in secrecy from your husband. Usually, healthy role playing games and complete openness with the partner helps to gratify these needs.
Next Steps
Ideally both partners should get sex counseling. Most probably your husband also needs to understand about your sexual urges.