Two things you should try.

Talk to him while you are topless. Make him look into your eyes. It is amazing how hard this can be for him. Punish him for looking at your breasts. He needs to focus on you first, not his desires.

Second, make him repeat what he is or is not to do (cum without permission, etc…) … And what he does and what he does not want (to serve you, to please you, to remain in chastity until you want him out, etc…)