Feeding them well? It isn't really uncommon for them to put on ~100g a month..
She hadn't even been paired up yet when she started growing those follicles, so I believe that my pairing her up for the first time a few days ago is just a coincidence and is not really relevant.This snake was way too young to breed. I'm sorry but that isn't even close to two years old! I've never even heard of anyone breeding a female that young.
And just because you "never even heard of anyone breeding a female that young" doesn't exactly mean squat. I've seen many people state that they do just that right here on this forum. And I know of a few that have paired them up at right around a year old and not even 1200 grams. There is more than one way to skin a cat, and whatever guidelines you pulled your "omg she's not even two years old!" line from is just that. A guideline. Deviations can and do occur. I bet you'd be shocked and amazed at some of the things that go on behind a few of the bigger breeders' doors.