A Pureblood Princess

Riley Macnair and Sirius bonded initially over Quidditch, James Potter, and being the should-be Slytherins happily sorted into Gryffindor. Should be a bond you can't break, right? But hormones, blood ties, and the ever ominous and looming future threaten to do what they can. James/Lily, Sirius/OC .. Rated M for safety.