Lunestia - The love of a sister.

Princess Luna and Princess Celestia have had special feelings for eachother for a while now, but will they ever confess? A lot happens in Equestria, and the main six can't deal with everything, so the sun and moon mares have to. It causes anger and unecessary fights, but in the end, doesn't that make them closer than ever?

Princess Cadence can feel their love, it's the strongest she's ever felt in fact, but can she help them convince everypony else their love is pure?