Quinn being the whipped one.
"Maybe it isn’t logical, to blame Brittany like this. After all, Santana is the one who dumped Brittany. And maybe someone could argue that Brittany is just trying to cope with losing Santana the only way Brittany in her Peter-Pan Unicorn world can. Maybe she’s just trying to make Santana jealous. Brittany is rainbows and sunshine, but she can be manipulative as hell.
But the reality is that no matter how many slaps and scratches are exchanged between them, no matter how many sweet Unicorn smiles Brittany gives her, if made to choose, Quinn will always choose Santana.
She’s never actually voiced it. She doesn’t like to think about it at all. If she does, she manages a quick justification, that she knew Santana first, that Santana was HERS first.”