My wife and i have only been married for 4 months (together for just over 4 years), and we began experimenting with D/s about 2 years ago. Our D/s life is by no means 24/7, as we only scene when we have the oppurtunity. Being married has only made our commitment as Dom and sub in those scenes all the more powerful - she even likened her wedding ring to a collar on our wedding night... you can see the similarities certainly.
Yours
Master Martin