Controlling the OH...

So I will be visiting my Oh shortly and she has said that after reading a lot of BDSM stories she would really like to try it so that one day she is my slave and the other I am hers. This means we will control what each other do throughout the day, and no matter where we are or what we are doing we have to do it.

The thing is I have never done anything like this is and was trying to think up some interesting things I can ask her to do. I wondered if you lovely people had any idea's, or if you have done anything like this.

Thanks a lot x