<human>: Give me the gist of the text in a nutshell

The father that I have always admired, the one I look up to and respect so much has a mistress. So my sister was on her Facebook and my father accidentally sent her a message with the endearment "my love". See, we know the endearment that my parents uses to call each other and it is a unique word so this must be someone else and not my mother. Since I am the eldest, my sister decided not to confront my father but forwarded me the message instead, and gave me the responsibility to talk my father. I did not want to confront him without any evidence, so I hacked his email accounts and managed to get hold of his FB account. And there they are, the evidences that will forever change my relationship and how I view my father. I called my dad to talk to him but he was on his way home and had to hang up. After hearing his voice, I could not gather enough courage to call him back so I just sent him the longest messages I think I would ever write in my whole life. No curses. But I told him I have lost all my respect. It's now 5am and my hands are cold and sweaty because apparently, my father has not informed his mistress yet that they have been found out. And I am now chatting with the mistress on FB pretending to as my dad so get some more evidence and her address. Because yes, I want to confront her. I am angry because I just lost my father today. I have always been a daddy's girl and me and my mom were never the best of friends but she is a great woman. I do not know how to go on with this. I need someone to enlighten me please. TIA
<bot>: My father missent a message to my sis, she had hunch that it was for another woman so I hacked my father's FB and found out he has a mistress.