A Slippery Slope in Marriage

I've been married to my wife for eight years now. We met when I was transitioning and we've always had an open relationship with boundaries, but one night it all changed. She'd never shown any interest in the BDSM scene before, but there was this look in her eye that night, a spark I hadn't seen since early on in our relationship. We started off slowly, with blindfolds and light bondage play, but eventually we crossed an unspoken line. One night she suggested roleplay involving consensual non-consent (CNC), which is something I'd been curious about for years. It was exhilarating and terrifying at the same time. We're both careful to ensure everything is consensual before every session, and it's become a significant part of our dynamic now. But there are nights when I lie awake wondering if this was really what she wanted all along or if we both stepped into something deeper than either of us bargained for.