A Secret Experiment Gone Wrong

I've been with my partner for twenty years now, and we thought we'd tried everything. But last month, I got an idea from a naughty book, a game to explore our limits. She agreed, but things quickly went too far. The fantasies, the restraints, it all felt thrilling yet wrong. Afterward, guilt ate at me. Did she really want this? Or was it just me pushing too hard? We've barely talked about it since, and I'm torn between regret and a twisted desire to do it again.