Anyone know this comic?

The comic is full colored and its western. The plot goes a blonde witch gets in a town where she gets captured by knights and locked in a cell before execution. While in the cell she lures a guy in to have sex with her so she can get released, after which he turns into a small demon. The girl figures out that she gets a massive magic buff when she climaxes. She decides to help the demon turn himself back to human and to figure out how to control her magic. The comic is written in a funny and cheerful way, and everything is consensual.