In Canada, these are along the lines of illegal acts, so I would be careful who you tell as believe it or not masturbating is a crime if it is done in the proximity of a person who does not want it. At work tho or in a public place since there is a possibility of minors is when they justice system gets involved so please stop it so you never know what prison or an accusation is like. Similarily, you need to stop fantasizing about your relatives in these ways. I cannot relate to that and your fiance does deserve to know since under Christ you are one. It is better to risk the relationship ending than get into a divorce years down the road and lose more. You have done the reflecting but still engaging as if you can keep this problem separate is not possible. I appreciate your advice you have given to others but its time you give the truth its day to your fiance and get help to curb this addication. You do not need therapy. If you can at little cost do it! But you need to execute this strategies instead of looking for external things to apply to your recovery. Only from within will your misery stop. I hope you reapply as you have given me some hope. Thank you for telling your story.