He shoots in your ass.

You feel dirty and you feel ashamed, but despite those feelings you feel more aroused than ever. No, that's not really true you admit to yourself. It's precisely because of those feelings that you are so aroused. The belief that what you're doing is wrong and that you are behaving like a slut is the driving **** to your arousal.

Despite what you have experianced recently, this is still the first time that you've been fucked by a guy rather than by a girl. Deep down you still identify yourself as a guy and here you are being fucked and willingly encouraging a complete stranger to violate your ass. It scarcely matters to you now that the reason you shook your butt and tempted him to take you anally was to prevent yourself getting pregnant. The feel of a hot hard cock sliding up your tight rear, stretching your sphincter until it hurts is driving you wild with lust.

You know that even if you avoid getting pregnant tonight that you will have still been changed by your experiances. With Gemma you could still pretend that being in female form was simply a means to an end, a ruse by your male personality to get a hot chick naked. Now you can no longer deceive yourself, in this body you are nothing but a slutty bitch in heat. Acknowledging what you are feels incredibly liberating, as though a weight has been lifted from you. You start to thrust back at the cock alternatively reaming your wet cunt and your sorely abused ass.

"Hurr hurr." The man behind you chortles, as he feels you pushing back at his thrusts. "Dirty little bitch ain't you?"

You moan in response and thrust back harder, wanting him to bugger you mercilessly. Your actions spur him and his cock pistons in your asshole, bringing increased pain and pleasure.

"First time up the shitter and you are already an anal slut." The guy taunts. "That shows you are a natural ****."

This dirty talk must have aroused the man just as it's turning you on. With an oath he grips your wide hips tightly and thrusts harder than ever to bury his cock to it's root. This time however he stops thrusting when he's fully inserted into your overheated ass. He cries out and you feel him shudder and a moment later you feel a wash of hot wetness deep inside your abused anus as his seed gushes. This is all it takes to trigger your own orgasm and for a few seconds both your bodies tremble as you gasp and heave in the throes of climax.

"Oh fuck, that was good." The man sighs as he pulls his wilting cock out your ass. "Take this bitch up the ass, it drives her wild."

His words remind you that other men were crowded around awaiting their chance to use your hot naked body. You might have avoided getting knocked up once, but that was finally down to sheer luck. Will your luck hold out, and if you orgasm with each time you are taken then how soon might you change back to John be triggered? You feel suddenly afraid, what sort of reaction would there be if you changed to a guy in the middle of this orgy?