In a way that surprises both parties.

"I love how this feels, I want to cum, I want to cum so badly..!" The demon smiles, believing that he was your submission, but your next words surprise him. "I don't want to beg, but don't you dare stop Kris! Don't you dare stop! Don't stop, don't stop..!"

Technically, you realize, you are begging him not to stop. But there is a definite difference there from what Kris had expected. Namely, that your will managed to show that you still had the will to defy him despite the lustful passions he managed to ignite in you.

And that, made your words carry far more weight than you imagined it would.

The mark above your breasts actually glow, and Kris isn't stopping. If anything, he's speeding up his thrusts. You clutch your sheets and actually hook your feet behind his back as you start to hit your peak. Just before you get lost in your orgasm, you hear Kris swear, "Agggh! FUCK!"

You both cum, almost simultaneously. You were slightly faster, but you barely notice. Even as you cum, you can feel his hot semen flow out and fill your final hole.

Your eyes are open and as you begin to cool down again, you can see Kris struggling to get his breath under control as well. And he seems to be... Gritting his teeth? Unfortunately, you can't muster up enough strength to care about his strange expression.

With a sigh, you let your legs flop down onto the bed and take in huge gulps of air. You feel incredibly sweaty and almost feel tempted to take another bath... Except you don't want to get up from the bed at all. After several moments, the demon removes himself from inside of you and you let out a small whimper as you feel him pull out of your anus.

He lets out a huff and in the blink of an eye, literally, he's suddenly completely dressed again. Kris gets off the bed and spares a glance your way before he starts pacing around the room. He's muttering something under his breath and you catch snippets of words like, 'unplanned', 'unavoidable?' (you really did hear his voice rise up a bit as though in question), and 'stupidest order imaginable'.

Your hand wanders to the mark just above your breasts. The proof of the contract between the two of you. He did confirm that forging a contract with him did mean that he would grant wishes within his ability to do so...

'Did that count as a wish?' You wonder. Apparently the definition of a 'wish' may be a lot more vague and broad in the demon realm than you originally thought. And... You've made quite the useful discovery. You're not entirely sure how you did it, but just knowing the fact that you can give Kris orders is sure to be advantageous.

The biggest proof... Kris had refrained from letting you know about this part of the contract. And there's a good chance that he never wanted you to find out about it.