Try to explain!

You look at her, and say, "Ummmmm, neither, Megan you will not believe me but I am actually your brother!!" She looks at you for a second taking in your new body and starts to laugh, "Good one, I have to admit you are a pretty funny girl. No seriously who are you?"

You rack your brain trying to come up with some way to show her that you are actually her brother. As she was laughing you said, "You remember that time you made me promise to not tell mom and dad when I caught you sucking off that senior in the pool house?" That did it, she instantly stopped laughing and looked at you with a fierce look of anger in her eyes.

"Okay you little slut, who told you that? It must have been John, where is he?" and she goes storming out of the bathroom towards your room. A few seconds later she comes back and says, "Okay where is he?"

You sigh, "Meg it really is me, I promise you. I went out partying last night, I blacked out, and then all of a sudden when I woke up I was a girl. I could not make this kind of story up if I tried. Please you have to believe me."