Your Sister , Lexi

The door swings open and your sister Lexi walks in , her blonde hair flowing down to her shoulders , topping her 5 foot tall frame, and says

"Hey Liam have you seen my.. What's with the weird book?

"I found it at the library , It's supposed to control people's minds" you explain

"Really?? That's so cool try to use it on me I want to see how it works" she asks eagerly

She always did believe in all that weird mystical stuff like psychics , dreamboards and things like that so it's not overly surprising she doesn't poke holes in your magic book story.You have always been sort of attracted to your sister , but there was no way she would ever go for you so you never really tried anything with her apart from 'accidentally' walking in on her changing a couple times.

"Alright let's see" you say as you flick through to the mind manipulation page

The page says something about just saying what you want while touching the book but your too distracted by your sister's low cut top and shorts showing off her body. Your teenage virgin mind is too distracted to read the book properly.

You look at your sister and stutter out " H..H..Horny"

The second you finish the word lexi shudders and lets out a light moan. She begins to put her hand into her shorts and fingering herself. You feel your jeans become a little tighter as your dick rises to a full 7".

Lexi sees this and pulls your jeans off in one quick , smooth motion which leaves nothing but your erect cock creating a tent in your underwear. Lexi pulls off your underwear too leaving your hard cock to spring free.

Lexi licks her lips and looks right at your cock and asks "What do you want me to do?"