The Sum of Her Parts by SadbhylSummary: Through Potential, season 7. The whole is greater than the sum of its parts.Author's Notes: This is all Kantayra's fault. At the end of her most excellent Double Spiked, she issued this throw away challenge: "OK, I know there are other B/S writers out there who have read this. And I think someone really has to write a S/B/B fic some day. After all, how fair is it that Buffy gets two Spikes, but Spike never gets two Buffys?" So here you go, Kantayra. Hope you enjoy it!