She's big enough to eat 2 pinkies at one time- she's a growing girl& one pinkie won't fill her up for a week. Depending on her cage temperatures, if warm enough, she'd probably eat 2 every 5 days with ease, but I'm not saying you should do that...it's also hard to say- I'm not seeing her. Most ppl on this forum will recommend only one item per meal, but keep in mind they're mostly not dealing with colubrids.
Of my 3 hatchling rat snakes, the oldest one easily takes 2 pinkies per meal now...the 2 hatched recently are still only on one at a time, but it won't be long. Colubrids differ in that their body is relatively narrower & longer, & their metabolism is pretty fast. I tend to feed 2 pinkies before I size up to fuzzies.
Another reason to double up is for specific kinds of snakes with abnormally narrow faces, like desert glossy snakes (which none of you probably have but they're sweet pets)or my TX longnose snake, whose normal meal is actually 5-6 f/t fuzzy mice; the largest he can eat is a skinny hopper, but he prefers fuzzies, and since he's a lizard-eater by "design", I'm just happy he eats fuzzies so well.