You and your friend Ethan decided to do a challenge. A bet. Who can go the longest without cumming? Semen retention, no fap, whatever you want to call it but the goal is the same: increase virility and performance in all aspects of your life. You really think it works!
But you didn't expect your stepmom to overhear you two discussing your progress so far, and confront you about it. She's noticed you're not acting the same, that you're distracted and not doing as well in school. Is that true? You really aren't sure...
She's had enough. Stepmom or no, she's going to make you cum. And hey, if she does it, then you can still say you haven't masturbated, and keep your bet going! At least, that's what she says...and watching her reach into you jeans and fish out your perpetually hard cock? You're not going to argue. Even if she is your stepmom.