Morgan Le Fay
The fairy Morgan walks through the woods and encounters an ogre who becomes a beautiful lady, by the action of his wand and to prevent an attack of the monster. Woman sexually attacked ogre and she resists as he can, until the helper elf fairy, Clifford, transforms back into ogre. This starts to enjoy and when it ends she takes her own magic wand and becomes ogress herself.
The story plays with the irony that the ogre is transformed to avoid attack fairy, but become a woman (supposedly to calm him) becomes a lawless lover. Morgan tries to disengage from its trap and asks his elf, Clifford, that transforms ogre again, but this only causes begins to enjoy sex and that she eventually turns into ogress.