you are an alpha male and a prince. One day you smell Enigma's pheromones, it makes you horny, and that makes you have sex with that Enigma.

a few weeks later after the incident you don't remember anything, or what your face was like, you were having breakfast with your royal family suddenly you felt nauseous.

after the incident, you and your family came to a party at the Imperial place, and that too you were pregnant...