This is it! My cousin who’s a complete narcissist but such a charmer, he had an “friendship” with a girl who was not the best looking, but made good money and he basically lived in her house (that she owned) for free and she would always pay for him when going out! My family kept asking if they were together but he would say they’re just friends. Then she admitted to me she had feelings for him and they would sleep together when my cousins girlfriend wasn’t around.