oooook this all completely came out of left field, at least for me. When did the girl show any romantic interest in him at all? Why is she suddenly all lovey-dovey for him? Im not talking about all that weird "I have to seduce them for no reason in particular" thing which is already strange enough, but every time he does anything slightly manly her panties just get soaked and I cant fathom why its happening. They are both (probably) hundreds of years old, as assumed from her "you're three hundred years too young to challenge me", so why is she acting like some blushing 15 year old heroine who has never talked to the opposite sex? Its the same with him, she is actually your arch-enemy, enslaved you, and basically threated to ruin your life and kill you, so why are you reacting to her like youve been madly in love for years?!?!?!?!? What the hell is going on?
Is it a part of the slave collars magic? That cant be right, or else people would have told her "oh yeah it also makes you want to fuck the guy, have fun."