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Cappie doesn't know what it is that makes him look at Rusty as more than a pledge, as more than Casey's brother, at least at first. Later he thinks it maybe has something to do with the way he smiles when he's finished an extremely complex math thing, and he has blue ink smeared across his lips where the pen he used was leaking, or the way he lights up when he's doing something with the brothers. It could be the way he looks at everything like he's never seen it before (because he hasn't, he's called Spitter for a reason), or the way his mouth slants when he frowns, it could be the way he looks in a dress, but Cappie's not admitting anything there. It's all of those things, really, and it's a list that could go on and on, but right now, Cappie thinks it probably has something to do with Rusty's legs around his waist, skinny and pale, with his curls, messy and sweaty and bouncing with every thrust, with his eyes, that he refuses to close all the way, because Rusty always has to know how he's doing, and this is no exception. Cappie is looking at Rusty, and he's thinking that it's probably time to call it love.