You take her to the library. You may be a douche, but you're a man of your word nonetheless. Plus -- anything to get her mind off sex. Or at least off sex with Cerise.
You and Cerise may be relatively shameless around one another, but she's still your older sister. You're not sure if can deal with the idea of fucking her. And with Whitney joining in, no less? ...
Things are moving too quickly. You need to find a way to distract Whitney from Cerise before she does something that can't be taken back.
"Over here," Whitney directs, leading you by the hand to a small desk in the back of the library.
Surprisingly enough, the study session goes smoothly. For the most part. Whitney is mindbendingly dumb, after all -- she can't wrap her head around the fact that a negative times a negative makes a positive. She also seems to be laboring under the impression that imaginary numbers are variously "fake," "gay," or "fucking fake and gay" -- depending on when you ask. In any case, she refuses to work with them.
"Try to keep up," you chide as she chews on her pencil's eraser. "Your arithmatic is great but you can't solve an algebraic expression to save your life. Are you sure you graduated elementary school?"
"Shut up," Whitney says. "It's like I said before, who needs this shit?"
"Not you," you admit. "You're on a fairly straight vector to a life in the service industry."
It's actually a pretty normal interaction with her, for once. But as you finish up the assignment, Whitney leans in and whispers: "I think we're alone, Ally."
Whitney reaches underneath the desk to molest you through your jeans.
"We're in public," you say. "Even you can't be this stupid. What if we get caught?"
"Everyone's gone for the day."
You reach under the desk to pull her hand away, but she swats at you. You get into a blind, uncoordinated hand-slapping match underneath the desk that feels more like playing patty-cake than fighting to maintain your purity.
"Oh stop being such a baby about it," Whitney says. "I'm going to jerk you off and you're going to like it."
"I'm going home."
"Your mouth says no, but your body..." It's true. She lays a hand on your erection. It strains against the denim of your pants, throbbing painfully. "Did you get my text?" she asks.
"We're going to wind up as registered sex offenders at this rate."
Her ministrations continue undeterred. In fact, they seem to speed up. You're not fighting it anymore.
"We'll have to alert the neighbors whenever we move somewhere new," you say.
"When we move somewhere together, you mean?" Whitney purrs.
"What? No-- not together, I mean separately--"
You grit your teeth as Whitney unzips your jeans. "Have you lost your mind?" you hiss. But Whitney has already disappeared underneath the desk.
You feel the cool library air around your cock as she frees it. Then the sensation of rushing air as she buries her nose against your glans and inhales as deeply as she can.
"I feel a little dizzy..." comes her muffled voice.
You can't help yourself: you scoot your chair back to look down at what she's doing. The chair makes a loud squeak on the floor that you wince at. You look around, helpless, trying to see if anyone was alerted. You see no one else around.
"Cum on my face, Ally."
You close your eyes and shiver. Whitney uses both hands to massage you. Her grip is a little bit too soft, like she thinks she might break it, which just makes it all the more maddening. Her hands are callused, yet smooth, and searingly hot. She stares at your cock like it's a religious relic.
You try to say something, but all that comes out are breathy gasps. "Are you close?" Whitney asks. "Are you going to blow?"
"God, Whitney--"
You feel a thrill in your gut. Whitney's palm clasps around the head of your dick as you erupt, trapping the load between her fingers. She stands, leaving you to fumble frantically and zip yourself back up.
The fun over, reality hits you again. "What if someone saw?" you ask.
"I told you," Whitney says, tipping her head back and letting your cum ooze slowly onto her tongue in ropes. "We were alone. You're too paranoid."
She licks her fingers clean and then kisses you on the lips.
"Thanks for the help, Ally." She gathers her things and goes.