<human>: I'm female, 24 years old, I don't live with my parents, but I've been visiting them for two weeks now.
I'm quite shaky right now, so please, bear with me.

My parents seem and weirdly enough are a great couple, still in love after 26 years, rarely argue, they enjoy each other's company etc.

I remember once when I was maybe 13 my dad saying something to the extent of "men will be men, it's in them to cheat".He has this old-fashion notion that a man can cheat on his wife  because it wouldn't matter, it's just sex and that isn't as important as family, stability.

He isn't very good with technology, so he gave me his phone to fix something.I've always teased him for the fact that he never reads his messages, asking him if he just likes the little envelope on the screen.

Anyway, I take the phone and see some texts  from a woman in which she says something like " my sweet love".My heart drops and I honestly can't look him in the eye.

I don't know what to do, I know that it is just a fling, I've always suspected my father wasn't 100% faithful because what he said when I was 13, that really stuck with me for a reason, but it's totally different when I have it confirmed, with a name and a telephone number.

Should I try to confront my dad or just ignore it ?
Any advice?

Give me the gist of the text in a nutshell
<bot>: found out my dad is cheating on my mom, don't know if I should intervene in some way or just pretend like nothing happened.