Several years prior to today I've heard with my dad while he was on a business trip, heard a voice and then "his phone tumbled" i let it slide as i thought it might have been hearing things.

Now today I find his Gmail logged in, not his address but a mumbled bumbled up combo of his name and my birth date IMAGINE THAT.

In there I've found emails going back from all the way of that phantom phone tumbling till 2 years ago.
There are messages, Images, chat history logs from skype and ICQ worse yet i know who the woman is, i know that his 2 friends suspected something as they always teased him about her, she( IT) has a family too.

What the heck should i do ? I'm 26 years old finishing my uni just now as I had severe health problems before, always lived with mom - dad was working from office half a mile from home and in another country combined.

Who should I tell and should i tell at all ? Mom always leaned on my support and as I'm an only child she only has me for support, dad was always a mix of stone cold pillar + family dad last 2-3 years he is the sole supporter of the family, I'm looking for part time jobs currently till I graduate.

My head is going to explode.