You of course

Grinning, you rush out of bed and prepare to go to your sister's room when Mom interrupts from downstairs, "Big Mac, breakfast's ready!"

You look at your clown. "Isn't it supposed to do something?"

The voice says, "You haven't told it what to do for the day yet."

Confused you ask, "What do I have to say?"

The voice sighs, "Think of a 'password' of sorts that allows you to use the illusion. For now your passcode is blank, so anyone can do it. Later, I suggest you make one for all your spells so other users can't mess with them. For now though.. Perform Big Mac's daily actions, illusion."

The illusion of you blinks and steps down the stairs, copying a bit of your swagger. You laugh. "I'm going to have fun with this thing."

Ready, you slowly creep to your sister's room and put your head against the door. There's moaning and the tell-tale buzz of a vibrator. Your dick begins to press against the sport shorts you went to sleep in.