Why did Jacintha Saldanha commit suicide over a prank?

Some things don't make sense to me and this is one of them. She had two teenage kids, a husband and a loving family and still killed herself over a prank? Jacintha Saldanha (pictured above left) is the 46 year old nurse who killed herself after being duped by a hoaxer pretending to be the Queen. Three days before her death, Mrs Saldanha was manning the hospital switchboard where Kate Middleton was taken to for acute morning sickness when she took a call from two Australian radio presenters – Mel Greig and Michael Christian – (pictured above right) impersonating the Queen and Prince Charles. They were transferred to the Duchess’s ward and broadcast confidential information given to them by a second nurse. Although she wasn’t blamed in any way for what happened, friends said Mrs Saldanha ‘took it very badly’ when prank was broadcast.
She was found dead on Friday morning in the nurses’ accommodation at the hospital. May her soul rest in peace.