As VanessaG posted, I think when one's parent ends their life, it deals a great blow to the child's sense of self-worth (as mom/dad did not love me enough to stay around for me so I must be unlovable...)..and it might impair their ability to deal with life's trials as their foundation has been shaken. They don't understand that their parent was in so much pain that life was unbearable. They only sense abandonment. Perhaps it might help you to explore this some more?