LDR wife fascinated by cuckolding after coworker brought it up. How do I handle this?

My wife and I are long-distance. A female coworker recently introduced her to cuckolding. She’s now curious and fascinated, saying she likes the idea of being desired in a new way. She loves me and says she won’t act without my consent, but I’m torn—partly intrigued, mostly jealous and blindsided. No action yet; I just asked for time. Anyone in a similar situation?