Chances are that she's very hungry, so isn't hiding... A 5 month old ball python on mouse fuzzies is way too small. When ball pythons are born straight out of the egg, they eat mice hoppers, which are a little bigger than fuzzies. Don't listen to petsmart people. LOL
How wide is the widest part of her body? A general estimate is that the rodent size should be the width to 1.2x the width of the widest part of her body. Or the weight of the rodent should be 10~15% of her body weight.