I think that a mistake many couples make is that they try to play too long. I don't mean chastity play that lasts for days, weeks or months. (Heavy breathing!) I mean round the clock; all day every day. (Otherwise known as 27/7.)
Unless the lady is a natural sadist, (apparently only 5% are), it will be a strain on the relationship. There must be give and take in all relationships, otherwise it's just abuse, (and not a relationship). I think respect is the key.
Some may even consider involving another person, to take the presure from the Domme. Everyone needs some down time. However, this option also has it's troubles. There are now three egoes to consider.
Anyway, in the fantasy, everything will run smoothly and to plan.
4 days ago