She's obviously pretty weak, I'd be careful about keeping the water shallow, unless you put a small towel in there too, something to give her traction.

No matter how badly you want her to eat & fill out, remember to only feed a small prey item...her system won't be able to handle it the way a normal
healthy snake would. Weekly small meals will do far more good than too much at once...a snake that is starving also does not have good digestive enzymes
ready to go.