No. You cum inside her like an idiot.

You thrust your hips and pump in and out of Brittany's pussy, making her enormous tits jiggle with each pump. You are completely mesmerized by her jiggling boobs and keep thinking how lucky you are for getting to nail the ultimate college slut. Lost in the moment, you completely ignore the warning signs of an approaching orgasm. You start to groan as you feel your cock spasm ramming your cock violently deep into Brittany's pussy one last time. She seemed to be thinking about something else entirely, but it suddenly brought back to the moment by your load groaning. "Did you... don't tell me you came... Ugh!", she is interrupted as if someone punched her in the stomach. You feel a rapid contracting feeling around your cock. You pull out your slightly softened member just in time and watch as everything around Brittany's pussy, including her labia, seem to be shrinking and losing fat. Her hip bones become very prominent as all fat seems to vanish around them. Finally, with no room inside her shrinking vagina, it shoots out the rest of your magical semen, which land on Brittany's thighs. They shrink slightly, too, but not as violenty as her crotch area.

As the effects of you magic sauce seems to subdue, you and Brittany study the damage. Her body shape looked like and inverted pyramid already, but she looks even more comically lopsided now.

"I hope you can make me back the way I was, freak, or you're dead meat!", Brittany snarls at you.