The Secret Flogger...

Married my best friend's sister, but lately, we've hit a rough patch. I started seeing someone else and playing BDSM games with her on the side.... We tried impact play last week.... She had me blindfolded, tied up in our basement.... She was pretty dominant that night, which surprised me.... Do I tell my wife? Is she really an asshole for wanting more spice? Should I just be happy and move on...