"If you can't get your grades up, I'm going to pull you out of college. You're going to waste your time and my money and if you can't figure something out, I will. You need better motivation".
I was mid lecture to your boyfriend, my son, and you could hear me from the other room. You two were staying here for the college semester to save on rent. A humble home in a small college town. Your boyfriend's tone doesnt carry through the wall that well but you hear my threat that follows crystal clear.

"If you don't get at least a 70 on your quiz tomorrow, you're losing the privilege of sleeping with your girlfriend under my roof. No. Sorry. No arguing. My house, my money paying for your tuition, my rules."

I really said it. I had briefed you on the terms of the punishment before talking with him. Of course the next day, your guy couldn't pull it together. That night, I came to gather you, casually, as if you had stayed up too late and it was the most normal thing in the world to slide a big hand around your hip and steer you to the bedroom.
It wasn't long before you were praying for your boyfriend to flunk every class...

~

Hope you enjoyed the prompt - this is a classic NTR/cheating prompt and I'm hoping to play it out with someone interested in being corrupted by your boyfriend's burly dad from a good partner and student into his cockwarming, fertile, free-use lover. Open to how this goes - maybe you quickly fall in love with the feeling of humiliating your lover, or maybe you continue to profess that your boyfriend is your true love even while doing depraved things with me. Maybe we take a tamer approach, and start a genuine romance between our characters, the promise of a much older, more capable man giving you a family and taking care of you something that sweet-talks you away each night until you've made your mind up to become his wife. Let's talk!