It is possible but you should avoid it, you are in front of a modelling problem: probably your application issue is allocated in the wrong place.
You should keep your controllers thin and all of your application's rules will be in your models. Take a new breath and think in a good reason for a controller to return a value. In other hand, the model can be accessed from Forms, Controllers and even views - although it access should be restricted.
Do not worry, this is a new comer problem in MVC architecture, I also tried to fill my controllers with application rules in my start... lol