Was the Red King the first or the oldest? They were all in his bloodline. If the LotON were siblings, the curse would have still worked. Another possibility is that the Red King was the patriarch of a faction of ramps that found the Maya gods, got supercharged, and then killed all the other factions.

Papa Raith had a brother that he threw out of a plane. This leads me to believe that he wasn't the first. How would his brother have become a wamp if Papa was the first?

This is an interesting thought.

Mab believes that White Court Vampires are "mortal enough" to be vessels for the Fae mantels.  She told Harry that Thomas would be his replacement if Harry didn't play ball.

Also consider that the Winter Mother was able to construct an enchantment that COULD have taken the thirst away from Susan.  Leansidhe was able to quiet the thirst for both Susan and Martin.  Harry immediately realized the implication -- if she could do that, then with some study, the thirst could be eliminated. 

The White Court is every bit as human as the half-turned reds like Susan and Martin. I don't think Lara's hunger would be any obstacle to the Winter Mother, or Mab or even Leansidhe.   

Lara would make a pretty good Winter Queen.  Much better at it than Molly.

she's been Mab for a thousand years, and the only Winter Ladies we know of are Maeve and Molly...there obviously were Winter Ladies before Maeve, so the question is whether they were actual daughters of Mab, and more importantly, were they discarded because they showed the same lack of restraint as Maeve? 

I think if the Reds come back it will be the Eebs