B1 & B2
Your main lover is B1, but B2 is the backstabbing creep who ruins everything. They’re like the extra meat on your sandwich that you didn’t ask for.
B1: 'I love you.' B2: 'I love you more. Also, I'm gonna cheat on you.'
B1: 'We're going to the movies.' B2: 'I'm going to the movies and then I'm going to cheat on you.'
B1: 'I'm your girlfriend.' B2: 'I'm your ex and I'm gonna come back and haunt you.'