I haven't talked about my parents a lot on here... But I really need some quick advice on this, here it is;

My parents marriage hasn't been all that great recently. My philosophy on it is: I accept that what they do is not my decision, but it is also not my problem, and I don't deserve to be put in the middle. My mom has ****ing grabbed me with both hands and dragged me, kicking and screaming, into it. She's turned into a teenager right in front of my eyes, and has attempted to get me and my brother on her "side", which really disgusts us.

But anyway, here's the thing I need advice on:

I woke up a few hours earlier than usual today and while I was lying awake in bed, I overheard my mom talking on the phone to her sister, who she's going to visit. her flight leaves tomorrow evening.
She's going to meet up with someone. I've known for a while that there's men she meets up with in a social group kind of setting, I'm pretty sure nothing has "happened" yet but she keeps putting herself in positions where it might. One time, she even told me about some guy and his kids and how some guy told her he wanted to take her home and keep her, etc. She makes stupid jokes about not having to come back if my dad learns to cook while she's gone (which is silly, cos my dad is very domestic and often cooks)

but ANYWAY, she's going to meet with someone, and it's top secret because dad is "too jealous". Now, I know that I don't want to get dragged in. But i'm already in, by knowing this. I want to tell my dad. I need to tell my dad. I can't live knowing this secret.

so.. because i'm probably not thinking rationally right now.. ; are there any good reasons why I should keep my mouth shut, that I should consider before I go for it?? please let me know quickly, before I can't take it anymore.
(and no, i'm not going to make a big scene.)

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