I absolutely agree with this last peice of advice. If you need to take her back then you should. An older cat is what you need and there are so many that need homes. It is hard to get older cats adopted and you would be doing a wonderful thing by adopting an adult.
I'm so sorry if I sounded harsh before, because I wasn't trying to. I'm just jealous because she sounds like my favorite kind of kitty!! I love em spunky!!
If you and your family don't have the time to spend with her right now then it might be best if she were to go back. She is young and will probably be easy to adopt. Nobody would be mad at you. Unfortunately, sometimes things just don't work out. It is big of you to realize it and try to do what is best for you and the kitty. HUGS to you and good luck!!