Update:

The litter is now almost two weeks old. The 13 that I kept with the original siamese mom are doing great. They are twice the size of the 7 babies I fostered with another mom. I just fed three of the smallest foster babies to cornsnakes and a kingsnake so there's four left. Those four will be frozen for the smaller snakes this weekend because I don't think they'll ever be normal size.

We'll see how many mom can produce with her next litter.