why don't you make a matriarchy book in which fl is top and ml is bottom ( like female alpha and male omega type , in which ml can get pregnant) so, our fl is straight low eq person with a very beautiful face and heartthrob charisma, people fall in love with her in first sight to the point obsession. So our ml character is manipulative, paranoid. He fall in love with fl in first sight and slowly his love turn into obsession, and he began stalking fl and imaging that fl is his wife, and he is pregnant with fl child , etc