Infidelity

Okay, so here's this theory I've had kicking around in my head. Everyone assumes Scar got his colours from Uru, but what if Ahadi and Uru weren't really in love, because it was an arranged marriage, and she had an affair with a rogue? And she had a litter of -three- cubs: Mufasa, Taka, and Zira. Ahadi found out and would have sent both Taka and Zira, who weren't his, away to another pride- but no king would take a male cub that wasn't his. Uru convinced him to keep Taka, but he was forever shunned as a symbol of the queen's infidelity. Later when Scar and Zira meet, they have no way of knowing that they're brother and sister, and when they try to have cubs, the resulting (Nuka) is underdeveloped because of inbreeding.