Concerns About the Sliding Path

Hello all, I’ve been watching this site from the sidelines for quite a while, and I really value the advice, stories, and personal accounts shared here. Soon I hope to share more about myself and my journey with my wonderful wife, but right now there’s something on my mind. We bought our first device in January after gradually introducing her to male chastity. It took her some time to adjust; initially she was just going along for me. Overall though, it has been a good year of intermittent play. The busy summer schedule and kids limited things somewhat. However, over the last month my wife has really embraced being the keyholder and is quite strict about keeping me locked 24/7 with very few releases (twice this month for a quick tease before locking back up). She’s discovered her power and noticed I’ve been more attentive and helpful lately. Like many others, it’s thrilling yet frustrating. I’m enjoying the journey so far, but something is really bothering me and affecting my thoughts. It concerns the slippery slope of where chastity play might lead us. To get to the point, cuckolding often comes up as a common theme. I see this essentially as cheating, which is something I want to keep at least a thousand miles away from. I love my wife and know she loves me; she wouldn’t consider it. No offense to those who enjoy that kink—I know many do—but the idea of my wife cheating would be devastating for me. Fortunately, we currently have a solid, trusting relationship. But what lies ahead causes my ‘slippery slope’ concern. I’m unsure about which activities we should allow ourselves to explore. For instance, my wife loves her vibrator and I enjoy using one on her to help her achieve an orgasm. We’ve used them for years, leading us to try other toys like a glass dildo, love balls, etc. I take pleasure in pleasing her with these items and am curious about trying a strap-on on her. Is this stepping onto the slippery slope? If she likes the strap-on, will she want something larger? Will I suddenly feel inadequate? Will she start considering real penises? I’d like to show her some blogs and this forum to share my fetishes and give her ideas, but I’m nervous about opening a can of worms that might be hard to close. I’ve read enough stories where couples started with a wonderful loving relationship and a chastity fetish only to find later that it went too far, dooming their marriage or relationship—even seemingly solid ones lasting many years (I realize there is bad fiction out there as well as real-life cases). I don’t want to ramble on. I’ll leave you with this question for the more experienced members: How do you enjoy this fetish and lifestyle within your marriage without taking it too far? Thanks