A complete stranger breaking into her computer then emailing things to her sounds unlikely. There can't be that many people with the knowledge and inclination to attack someone (in the sense of gain a shell on their computer and pull data off) at random and there are a very large number of random targets.
If she's put naughty pictures of herself in dropbox then I could believe they've been stolen (and possibly even emailed back to her), but if the sensitive information is things like "you live here and have a dog" then I don't believe it was from breaking into her computer. Much more likely it's from facebook. Actually even if it's naughty pictures, I'd be more likely to blame an ex boyfriend than someone she's never met.
If she's put naughty pictures of herself in dropbox then I could believe they've been stolen (and possibly even emailed back to her), but if the sensitive information is things like "you live here and have a dog" then I don't believe it was from breaking into her computer. Much more likely it's from facebook. Actually even if it's naughty pictures, I'd be more likely to blame an ex boyfriend than someone she's never met.