The only way I can see Sonia existing in the main line is if she was the sister to a male Belmont heir, but he was too young to wield the whip at the time, hence she had to take it up and rise to the occasion. But either way, her child would not continue on the main Belmont lineage. Though, I think I made it a point elsewhere, as far as the branching off into other families, she can do that. I mean, that's likely how the Morris clan is connected to the Belmonts(female Belmont married into the Morris family, hence her children would be Belmont blooded Morrises). And as far as that was concerned, such a role as being the connecting link of two families, that's no small role. That female Belmont, alone, is responsible for the Quincy Morris, many years later, as well as John(uh, and Jonathan...urgh... two out of three ain't bad).