Montjoy, I've been thinking today about her parents and wondering how old they are now. I assume once one or both of them have passed, Amy's case will fade away...
As an aside, I found this: the water in Aruba was described by her family as "freezing": (bold mine)
"Once back in civilization, the Bradleys had lunch at a Taco Bell and then drove to Palm Beach where Iva, Ron and Brad swam in the ocean, calling to Amy, laughing, "Come on in,
the water's freezing!" Amy clung to her dad's back in the water for a while, then got out. A certified life guard, she swam in her neighborhood association from the time she was 5 until she was 18. She was an assistant to the swim-team coach at Longwood and coached her aunt's neighborhood association, but she wasn't crazy about swimming in the ocean. Mainly, she was afraid of what else might be swimming in it."
It also sounds like her brother Brad is the one who left the sliding glass door ajar:
"Finally, Brad opened the patio door and rolled into the sofa bed he was sharing with Amy during the trip. She stayed behind on the balcony.
At about 5:30 a.m., Ron awoke and saw Amy's legs on the lounge chair on the balcony. Thinking she had fallen asleep, he went back to sleep."
http://www.styleweekly.com/richmond/part-ii/Content?oid=1390780