You follow Mike to his small apartment, as you are about to undress in order to enslave Mike you remember that you were a guy once and decide to switch things around. You use your new powers to swap bodies with Mike. However as you come to inhabit Mike's body you feel your powers changing it to suit your succubus nature more.
Discovering that everything you exert your dominance over becomes more feminine and womanly, you decide to go back to your original body before enslaving Mike who has now became "Michaela"