There is nothing wrong with this desire at all. In fact, a tiered hierarchy of Dom, switch, sub is something I hope to have someday myself, sort of like what the Strayes have.

In my ideal situation I as Dom would be the top dog. Under me would be a switch who would submit to me sexually, but would also be the woman I introduce to my vanilla friends, go to the symphony with etc. She would help me in dominating the lowest member of our household who would be a 24/7 sex slave and domestic servant.