Thank you, everyone! I figured she was just finding a comfy position, but I like to get a second opinion, since I'm still pretty new to the hobby. Better safe than sorry! I've heard of females laying like that when gravid - but she is, indeed, too young and too small for that and hasn't ever been exposed to a male. She seems to have hit a growth pause, juuuuust below 1kg...
She really is a wonderful girl. Extremely bold - and she's the one that I have to make sure her tub is closed when I'm feeding anyone else, because I had her poke her head out and snatch someone else's rat off the tongs, even after she ate her own! Greedy slither.