<human>: Can you give me the gist of the text in a nutshell?

So I've been reading on this subreddit for a few months now and never thought I'd have a reason to post on here, but here goes... (please excuse my grammar)

So today, my parents and I went to a car dealer, because my dad wanted to buy a new car before school starts for me this year and that way I can use his old car to drive to school.

I had to use his phone because he asked me to lookup a restaurant to eat at after making the deal. I go ahead and do just that when suddenly a notification from an unknown woman on facebook messenger pops up and says "ya lo saque, mi amor," which translates to "I took it out, my love". I panicked when I saw it and had no idea what to do, and I know that snooping is wrong so I didn't look. Should I confront my dad about it? or confess to my mom about it? I really don't want my parents so separate, but I'd somehow feel guilty knowing he might be having an affair. It sounds selfish to me.
 
Also, my dad lied about not being married before he met my mom. My mom found out when I was 7 years old and dealt with it. 

Another thing, I've seen my dad send flirty stickers on fb messenger ACCIDENTALLY while jokingly snapchatting that my dad has a facebook.

Any advice at all would be great. Please. Thanks.
<bot>: I saw a notification from a woman I don't know on facebook messenger that was for my dad, and he might be having an affair. I am at loss.