Both

Of course you immediately start to suck on that cock, licking his precum covered tip, sucking it into your waiting mouth. With one hand you lean against the wall, with the other you start to wank his cock into your sucking mouth, draining more and more precum out of his tip.

You get so horny from blowing that nasty cock in front of you, that you didn't notice the cock behind you has started to swell more and more, throbbing increasingly. His thrusts have gotten very unsteady and you could hear him moan and grunt through the wall.

The cock in front of you was twitching and throbbing, so you took him down all the way into your mouth where he immediately started to explode, pouring down one massive load of sticky cum after another. You got so off from the cum-splashing cock in your mouth that you almost didn't notice the cock behind you has suddenly stopped fucking you, and with the guy behind the wall grunting and moaning loudly it squirted a massive creampie into your fertile pussy.

Getting inseminated from both ends at the same time makes you feel so incredible slutty that you exploded right there, getting an massive orgasm that nearly let you faint. Your knee where shaking like crazy, and the thought of maybe getting knocked up by some random gloryhole stranger made you feel hornier than you've ever felt in your whole life.

This time, both cocks stayed inside you a little longer, slowly fucking you, dumping every last drop into your both holes, until finally they both shrinked and popped out of your holes. You feel a huge wave of cum leaking out of your pussy, running down your legs and onto the wall, leaving long cumtrails on it, until finally they mix into a small puddle of cum right under the hole.

As both cocks have disappeared, you somehow regained your consciousness, realizing that you really might have been impregnated by some dirty, filthy cocks. Fear rises inside you, but somehow the thought also turned you on. If you only had listened to your parents and took those damn birth control pills ...