Mistress and I are 1 and 2. (We probably would be married, but that's not exactly legally possible. )

We started out kinda vanilla. Both of us were already into BDSM stuff. Play eventually moved into the Mistress/slave relationship. I'm not sure how much that has effected the relationship, really. We communicate really well and have a great bond, but it's been like that since pretty much the start. If anything, the D/s stuff has made the great even better.