Pay your debts

You decide to move on Stephanie, putting down the stereotype gun as you move up and tangle your lips together. You moan into her mouth as she grabs hold of your ass and give it a good squeeze. after a few breaths of making out and toyful teasing and rubbing of breasts and butts, your hands move down to begin pulling Stephanie's jeans off her hips. You then promptly remove her underwear and kneel between her legs and begin working her snatch with your fingers as you move closer and closer with your lips, breathing heavily at the juicy meal you're about to receive.

...

You find yourself conscious but exhausted in your own bed, the details of the past moments washed away by a godlike climax. Stephanie lies besides you and seems to have experience about the same situation. You both get up to take a shower and Stephanie leaves you alone to study for the test. You must admit, it's a lot easier to focus now that you'd gotten some of that horniness out of your system, and the questions of the stereotype gun fades to the back of your mind.

...

A few days later, and you see the stereotype gun lying around as you were about to go to the gym, remembering that you were actually looking into how that thing worked. You've been so busy with school, guys, parties and Stephanie that you've forgotten all about it. You remind yourself that most likely, that gun was what turned you into Marcy to begin with.

You give your ass a glance and shrug. You don't feel like using it on yourself, anymore. You're doing good in school and you never have to masturbate to get off, But it might be fun using it on someone else...