Hacking email, social media, phone help?

Anonymous
This is in hindsight for a very good reason. I planned on reporting my aunt who is my great grandfather's POA to the APS, for elder financial exploitation. She's stolen money from her deceased mothers bank account hours after she died and taken money and other possessions from her grandmother when she was close to dying and after she died. The idea was originally to get into her email, then change the Facebook password and make a post about the shitty things she's done on her page. With that I wouldn't report her to the APS. I can't find her email address for the life of me and if I ask her for it, it will look sketchy. The last idea is to hack her phone which I have no idea on how to do other than downloading software and somehow getting into the phone.
Hacking email, social media, phone help?
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