| There really is not enough information to give you your answer. If you family member is a type two and taking insulin, ketoacidosis can happen over a much longer period of time. If you family member is a type one, it only takes hours to days for ketoacidosis to make them quite ill.
Even if your family member planned this as an attention seeking illness, she needs help. Either way, she is playing a dangerous game that can end in complications or death.
Not testing your blood sugar "ever" when you are taking insulin is just flat dangerous. Your family member needs education and help in learning how to deal with diabetes. If her blood sugar was low and she took insulin, she could go very low and end up unconcious or worse.
Find help for your family member. She needs help and if this is an attention seeking behaviour, give her the attention she needs. She is playing with matches and gasoline. | 
