Introductions discussion

Alright everyone, here’s a quick background on me and my partner. We’ve had our ups and downs over roughly 16 years together and have shared a home for the past seven. She recently brought up the topic of fidelity. That pushed me to purchase the cb-6000s. I explained that during weekends when I’m away, I’ll be locked up while she keeps control of the key. My hope was that this would ease her concerns. She understands my nature well. Her immediate reaction was, “If you really want out, nothing can keep you in.” And she’s correct; since I work on cars professionally, I could remove the lock in under half a minute. However, I think what she isn’t fully grasping is the effort required: driving to my workshop, finding cutters, and cutting the lock off. Afterward, I’d need to drive back out to meet whoever it might be and hope they are still keen on intimacy. Despite that, I have no interest in anyone else. I am quite happy with her as my only partner. I’m not sure what more she expects from me. Beyond this specific issue, I’ve long been curious about chastity. I read blogs, enjoy looking at captioned photos of couples and cuckolding scenarios—it’s all rather appealing. I like the idea of playing games or trying short-term lockups with occasional brief releases. Does anyone have tips for a total beginner in both men and couples?