How did my ex's gf get the data off my kid's iPhone 4s?

The evil girlfriend of my ex says her computer "accidentally" downloaded all of the data from my daughter's iPhone 4s IOS7. She claims to have just "run into" this weird file when she was looking for another photo on her computer. Cassidy says the phone was locked, and she had noticed the computer had an old version of itunes, which caused a pop up letting her know the version of Itunes was not compatible with her Iphone, and wouold need to update itunes in order to sync her iphone, The evil step mother claims she had no idea the the information was downloading onto her computer, and she just "happened" to find this "big file" with Pictures, texts, notes etc. I am appalled at the breach of basic human privacy. I need to know what steps had to happen for her to accompish this, so I can get my ex to believe she did this on purpose, and try to make sure it doesn't happen again. Thanks

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