"Stop again honey. Let yourself calm down. I don't want you having a heart attack, do I?"
Not again. It hurts so much, stopping so close to the edge. Tears well in your eyes.
"Now I don't want you to think me cruel boy, so I'll make you a promise. While I'm training you to pleasure me, I'll see no other men or women. I'll be faithful to you. After all, anyone willing to suffer like this for me is worth holding on to."
Your heart jumps with elation, your cock throbs at the thought of fucking her over and over again.