Keep trying to persuade him to stop.

"Ritter... Please. Please prove to me that you aren't animal that can't control own urges" You say and become bold enough to grab his hand and try to pull it out of your panties. Surprisingly Ritter allows you to do just that.

"And what I'll get in return?" He asks looking straight in your eyes.

"My trust." You answer as you try to pull his other hand away from your neck. Again, he allows you to do just that. "I can see in your eyes how much you want me. But should you proceed you'll lose a chance to get anything but my body"

"What else but your body I may need?" He asks with no trace of aggression and hatred you heard just a minute before.

"You said it before. You want my respect. And... " You are not sure if you are honest with yourself now "We may become an actual... hm... pair. In the future"

Ritter laughs "Yeah. Girl like you will fall in love with someone like me. You are ready to promise anything to avoid being ****"

"I am not promising you anything but a chance to become my man somewhere in the future " You answer confidently "Proceed now and you'll blow the chance away forever. Choice is yours. " It is a moment of truth. You have nothing more to say. It is up to Ritter what will he do next.