The Pulchritudinously Hideous Exception

There's one rule in life. never like your best friend's boyfriend, even if you liked them first. And you definitely cannot like them if they happen to be your brother's best friend. Taylor can't not like Dash just because he's best friends with her brother Gregory, and she can't force herself to not like him because he's dating Rosie, her best friend since first grade. But what happens when the variables change?

Rules are meant to be broken, and there's always an exception, no matter what the situation is.

Is she the exception?