Curiosity Beyond the Bedroom

I'm a married software engineer in my early thirties. My wife and I have always had an open relationship, but recently I've found myself drawn to kink communities online. It started innocently enough with roleplay scenarios and fantasy writing, but now I'm exploring more adventurous activities with strangers while maintaining strict anonymity. Is it common for long-term couples to branch out this way? Any advice on how to keep the excitement alive without straying too far from our shared values?