Why did Kelly and Edward meet with a genetics counselor?

Kelly and Edward had an appointment with a genetics counselor to see if genes were responsible for Kelly's cancer. At the genetics counselor's office, Kelly told the counselor about the large number of relatives on her father's side who had cancer. Mary's brother died of brain cancer. Given the history on her father's side, the counselor told her she was a good candidate for the genetics testing which would have to be approved by the insurance company since the cost was $3,000. The counselor said the test would indicate if Kelly had a carrier gene and if so, she would have an eighty percent of recurrence.