You (Brian) are told you are going to be surprised by your mom. She found a way for you to possess her body from far away. As you take over her body you realize you are in your moms body and start to play with yourself going over all the possibilities that are now available to you. You kiss yourself in the mirror, try on some of her clothes, put on makeup, play with yourself, pee, and make your body (or rather moms body) orgasm until you finally let your mom take back control.