I would recommend that you begin a strict regiment of supervised masturbation therapy. First let me say this: use of the chastity cage is good and should be continued. Next: put him on a masturbation schedule. This schedule should be STRICTLY ENFORCED. when he is locked in the chastity cage and the sister is present, present sister with a key to the chastity cage, now both you and sister are the only ones that have a key to the chastity cage. At this time you will now explain to the boy that - First he is on a strict masturbation schedule. Second - explain all ,… ALL erections, masturbating and ejaculations will be STRICTLY controlled by yourself and sister. This means any AND ALL erections must be reported by the boy to Mother and Sister. All masturbating must be scheduled and APPROVED by Mother and Sister. and finally, and MOST IMPORTANTLY ALL ejaculations must be scheduled and approved my Mother and Sister. That’s just for starters. Other conditions and rules should be based on those first two rules and strictly enforced. I would suggest discipline be administered with a wooden ruler (penis ruler).