A little exaggerated I'm sure.
I think Britney suffers from mental illness. Her team is doing the best they can to manage the situation. Of course her kids are a great incentive, certainly, however I'm sure it was presented to her more as if that if she did not care for her well-being it may result in the loss of her children. That's gives some perspective and insight to someone that may be reckless and irrational. The tour is in place to a certain degree to provide her with structure I believe to an otherwise potentially unstable person that can easily attain an unstructured life