Boundaries are the start of the change your loved one sees from you.  When we set boundaries, we are teaching the people around us how to treat us.  As you learn how to set boundaries with your loved one, they will have no choice but to respond (or react) differently.  You change the dance and they follow.  
Learning about boundaries requires a whole workshop because it is hard, uncomfortable and can be messy.  Loved ones do not say "Thank you very much!" the first time you set a new boundary.  They are going to react with anger, be indignant and will probably argue back or gaslight you.  This is where the rubber meets the road and you have to maintain that boundary.  
During the workshop, you will learn language to help you set small boundaries, what to do when your loved one pushes back, argues, gaslights you or blatantly breaks your boundary, and how to manage your feelings through the whole process.  You will learn what is your responsibility, what isn't, and what to do when you are blamed or pushed into something you don't want.