"Maybe because you were the other guy messing around with his girlfriend?" Faith just looked at Sam, actually in the eyes for more than five seconds for the first time since that conversation had even started. "I don't know why he took her back, and I may think he's stupid for doing it, but he still deserves an apology."
She felt a brief flash of absolute fury, one that she really had to force back down when he said those three words. It's not cheating. Faith just about resisted the urge to pour his drink over his head and storm out, even if it took a few seconds to compose herself. "Right, because the 'I was thinking about you the whole time, baby' excuse has never been used by a cheating man before," her tone was more sad than shouting, just resigned and more than anything tired. "You talking to her is doing more than bothering me, it's saying to me that again you're caring more about whatever twisted obsession you have with her now than about making things better with me. She used you to try to end the world, she tried to destroy your family and she was worshiping Lucifer, what more proof do you need that she's not the person you always wanted her to be. Maybe she's being genuine in wanting to make things right now, but that doesn't change that she was lying about everything then."
She broke off as her voice began to catch in her throat and she closed her eyes in frustration for a moment as she forced her breathing to remain calm. "Sam, you cheated on me with her, for months. And now you're obsessed with catching her out and you think that's just going to bother me? If that's all you think then you really have no idea just how much power over my emotions you have."