Like Kate and oblivious to the swap

Your body is sat on Kate's bed reading a book. She glances up as you walked in.

"Hey, bro," he acknowledges you as you stepped into the doorway "What are you up to?"

"I, um" you hesitate not sure if you should just straight out ask if he is Kate "I was wondering if you'd seen my Xbox controller?"

"Jeeze, I don't know have you tried looking for it?" he snarks with a roll of his eyes.

That certainly sounds like Kate even if the voice and the body are yours. Still, it's hard to believe she could be in your body and not even notice.

"Kate, I was wondering if you had noticed anything, unusual?" you try again asking as directly as you dare.

"You mean apart from my annoying little brother bothering me while I'm trying to study?" he said irritably "No, everything is completely normal apart from you dork. Now shoo."

That's Kate alright, her tone and mannerisms match your sister's perfectly. It seems like only you are aware of the swap. A number of exciting possibilities run through your mind and you return for the calculator eager to try more experiments with it.