Honestly, as long as she keeps a good ball python shape you can feed on whatever schedule you prefer. These days, I'm more of a feed as they need kind of keeper. I feed every week but not everyone gets offered a meal. Animals that have skipped a few meals, are looking thinner, females building or males breaking from pairing get offered food while any chunkier looking animals get skipped. While I feed every week only about 1/2 of my animals are fed per feeding session.