Some explanation of your behavior

"Thank you, Doe," you smile giving her a hand, "You are wonderful. I came three times! No girl ever achieved anything like this." She doesn't answer you so you continue "I got a chance to fuck you in a way I wanted, just like I dreamed for months."

"You used me like some cheap whore," she says struggling with coughing, "So, you want me to be like that, hurt and humiliated? I thought you had another kind of interest in me." She pushes your hand away, your friendly tone removed her fear, but hasn't removed her anger.

"Listen, now you know it. I am sexual sadist, I enjoy sex when I completely own my woman, when I use her in all ways I can without thinking about her needs." You sit on the floor near her, "Romancing and stuff like that just don't make me hard enough, unlike the things that I just did with you." You wipe her tears, "I would stop after one firm NO. But you are a worthy person and you don't break your bets, right?"

"Right," she sobs. "So you want even more?" You are delighted to hear that she is too proud to abandon the bet and your mind wonders about future possibilities. Of course you are not ready to fuck her once more right now, but you can make plans for later. Or you could try to be a good guy and let her off the bet now.