Oh okay thank you for the input can her tail unkink itself? Since she's being fed properly nowA kinked tail is not normal and can indicate calcium deficiency or MBD, but since you're feeding a healthy diet, she might just have that tail as a result of a previous calcium deficiency. Unless you start seeing other symptoms of MBD, I would just keep feeding her a nutritious diet and let her enjoy life.
A little info:
Health Issues in Crested Geckos
Crested Gecko MBD: Calcium Crash & Metabolic Bone Disease | moonvalleyreptiles.com