Hi,
It does happen Wes - it happened to me with a ball python when I accidently bred my first clutch of balls by being an idiot.
She was 1200g+ and passed 3 eggs and retained 3.
I'm not proud of being dumb enough to let it happen in the first place but it did make me a lot more cautious and prefer to avoid problems rather than just assume it would never happen to me or that everyone else was just making it up.
This is the first year since I have even considered trying to breed a smaller female and this also looks to be the first year since that the snake in the old thread might actually breed.
If the smaller girl breeds without problems this year I may meep less about breeding underage girls - but if she doesn't I'll keep recommending people wait till the snake is older/ larger.
Sorry for the off-topic (and off-species ) just figured it might fit.
dr del