Chastity and orgasm denial discussion

As I mentioned in my intro, I’m primarily a dominant person and my wife, who I love dearly, isn’t much of a Top. Her attempts to take charge don’t go very far, but that’s fine by me. While I usually make the final call, I am quite curious about playing with chastity. I know a few hours in a cage is brief compared to months on end, and my honest goal is short sessions involving caging, playtime, release, and ideally intercourse right after. This perspective comes from our sex life being practically dead. I want to explore this kink while injecting something new that isn’t too intimidating for her. My plan is to present the lock and cage when the kids are asleep with these boundaries: The cage must come off before I head out for work (which makes sense since I teach, and having it out would mean humiliation or even losing my job). She can set whatever goals she wants for removing the cage as long they aren’t domestic chores. Forcing someone to clean a bathroom is a common fantasy; that’s just not mine. She can take it off whenever she wishes, but I won’t make any requests of her in return. I’m happy to suggest and participate in any intimate or platonic activities she enjoys. What I want to see is some gameplay and also an awareness that I have a penis. I hope to spark interest in the kinky sexual side without turning her into a full-time Top. One, it likely isn’t her thing; two, it isn’t entirely mine either. Of course, this all starts with bringing it up properly. Since she dislikes being tied up for long periods, doesn’t love spankings, and isn’t huge on name-calling, I’m not sure exactly how to proceed.