~AnimalAddict~ wrote:As far as I know of that, it's just a rumor that's never been confirmed nor denied by Erin Hunter. A lot of people think it's true. I'm one who doesn't.
"It has been confirmed by the Erins that Firestar is Scourge's half-brother (Scourge and Firestar share the same father),"
[Wikipedia]
"Lakestorm(Q): to Vicky: Is Scourge related to Firestar in any way?
VickyHolmes(A): Do I have to fess up? *evil grin* Actually, some of you have guessed it already, so huge special purrs for being so eagle-eyed! Scourge and Firestar are half-brothers! Quince’s mysterious mate, who’s mentioned as a ginger cat who loved gazing into the forest and wondering what was going on beyond the garden fence, also fathered another litter of kits with a different queen. And one of those kits was Rusty! (Another was Princess, of course.) These kits were born quite a lot later than Scourge, who is a couple of years older than Firestar. The clue was that Scourge’s father was fascinated by the woods, just like Scourge…and Firestar! So Firestar’s greatest enemy was actually his kin, and the only cat he has ever killed was his half-brother. Gasp!"
Here