No, it's just not worth the risk

'Permanent' is a very long time compared to a single year. You kick yourself mentally, over and over, for getting into this situation in the first place. But now that you are, there's nothing else for it but to accept the lesser evil.

And so, before too much longer, Sam cries out. "Fuck! Cindy, slow down! I'm getting close!" You do slow down, and move closer so you're ready to mount him. You're about as dry as the average desert, but you don't need to actually fuck him. So long as his cum gets inside of you...

Your eyes focus on Sam's cock as you pump it. It's a simple choice, if a brutal one. If you keep going just like this, you are almost certainly going to be a **** for the rest of your life, unless Sam or whoever he passes you on to ever lets you get off campus. Let it shoot its load inside of you, and you'll at least have a chance of it lasting 'only' a year. Not much of a choice, is it?

You rise up on your knees, holding his cock against your abdomen, but not yet at your entrance. "Shit! Do it now!" You feel it building inside of him. He tenses up. His sack contracts. A pulse travels up his shaft. Then, a jet of cum shoots out into the open air and onto your belly. "Aaah! Cindy! What are you doing?!" Another string of cum. And another one. You start moving. The fourth splashes onto your labia. By the time the fifth pulse hits, you've got him placed right against your pussy. It's only a relatively small amount of cum by this point, but it's enough to seal your fate.

Sam pushes you violently onto the floor. At first, you assume it's anger at your treatment of him. Looking up at him, though, he seems more confused than anything else as he stares at his own hands. Then he slaps his forehead and collapses back onto the bed, laughing. "What the fuck, Sam?" "It's your own fault, Cindy! The GAME wants me to keep you from getting pregnant, so I guess I shouldn't be filling you with cum, then! Oh, fuck. There are times when I hate these GAME's. Then again..." He looks over at you, grinning. "I guess some of them work out pretty well for me, don't you thi-"

Sam's gloating is interrupted by a sudden jolt of movement, though he seems to catch himself an instant later. Taking a deep breath, he speaks with a great deal of tension in his voice. "Cindy. There's a pill in the back of my pants. It's plan B, and you need to take it. Now."