Caught in the Act, Am I Wrong for Wanting More?

I'm a professor at a local university, pushing fifty, and married to a wonderful woman who has been my rock through many ups and downs. For most of our marriage, we've lived a very fulfilling life together. However, over the past year, I have developed an interest in BDSM that she isn't comfortable with. It's something that has grown out of curiosity and imagination rather than any deep-seated need or trauma from my past. We've tried to talk about it openly but ultimately decided this was just a personal journey for me to explore elsewhere. One evening, I met someone online who seemed to understand my fantasies better than anyone else ever had. She wasn't much older than our kids, in her twenties, and was open to the idea of exploring these kinks together. We agreed to meet in person under the condition that everything would be consensual and clear boundaries were set from the beginning. The night came, and we decided on a place where we wouldn’t be easily spotted but still felt safe. The electricity between us was intense as we talked for hours about our fantasies and desires. Eventually, I proposed engaging in some light bondage and she agreed enthusiastically. It started off gently with me binding her hands behind her back and blindfolding her while whispering commands softly to guide her into a role-play scenario. It quickly became clear that this was going to be more than just an ordinary date, the atmosphere transformed, and my inhibitions melted away as I explored her reactions under these new conditions. She responded beautifully, laughing at my silly antics yet showing remarkable restraint when we discussed our limits beforehand. The encounter ended abruptly when she suggested taking things further, which wasn't what I had planned that night. As it turned out, this was the first time she had experienced anything more than casual encounters. We shared a tender moment of mutual respect and agreed to take things slow from here on out. Since then, my curiosity hasn’t waned; if anything, it has grown stronger. The encounter left me craving more exploration but also reminded me how important communication is with any partner in such sensitive matters. So here I am, struggling internally over whether pursuing these desires further is wrong or right given the context of my marriage and professional life. Am I crossing a line by seeking out experiences that aren’t fully shared with someone who loves and supports me? Would continuing to explore this path be considered betraying her trust even though it's consensual between myself and another adult? Please share your thoughts in the comments, am I being an asshole for wanting more, or is there a way to balance this journey while respecting my wife’s boundaries and maintaining integrity?