Thunder Bolt and his older sister, River, are as close as two siblings can be. Whereas most fillies would think younger brothers as being annoying creatures, River adored her little bro, almost to the point of being a second mother.

When River left home to attend college in Manehatten, the down trodden look on Bolt’s face nearly made her want to fly off the train and cling to him for dear life, so when she returns home after four years of being apart, save for special occasions, the two siblings are beyond overjoyed. But River has two surprises for her parents and brother; she is moving to Baltimare.

And she is getting married.

Her husband-to-be is no other than Flame Warden, the stallion Bolt hates more than anything.

Can Bolt overcome the ten years of built up hatred he has for Flame or with the two stallions forever be at one another's throats?

Previous fics:
Note: Prior reading of Books 1 and 2 needed for Thundering Rivers, Rivers of Flame

Book 1: New Town, New Beginnings
A Life in Ponyville side story: A Blast to the Past
Book 2: Forever Love
A Life in Ponyville stand-alone: Love: Reassessed