Her body will fuck you constantly

“Mmm that’s a tough one,” the imp says, pretending to think as he plays with your body. “But I think I can do something for you, if you were to break this circle. Then I could use my full power, and I guarantee her body will fuck you constantly. But I get to decide how. Deal?”

The witch starts pleading, and threatening you not to make any deal.

“Um… I’m kinda stuck. Get me out and then I could.”

“Easy! I get you out, you break the circle, and I force her body to fuck you, but you agree I decide how. That seem fair?”

He really is trying to get you to agree, and with his expert skill he has you near cumming again, distracting rational thought.