I am worried as Ethan seemed upset and embarrassed

In what way does this affect you or Tim???

If you feel the need to say anything to anyone, maybe you could try having a quiet word with Emily to be more careful with her phone in future if you feel that the contents of her texts are inappropriate for her son to see... but even there, she still has the right to tell you to mind your own business.

No.Stay neutral.He's going find out the truth.This should be from his parents.

They are already separated... I'd just mind my business....

He already knows she is cheating with him and they are separated. So you can mention it if you want or not. Unfortunately, Mark with be part of Ethan's life if Emily and Mark continue to date.

I wouldn't,just try to comfort the child

I’d stay out of it.

Only if he wants to get back with her, he should know everything. If he's over it though then telling him will serve no purpose aside from upsetting him.

no. you’ll only make the kid’s life more complicated.

never get involved in other people’s personal business. the messenger will be shot on sight.

Stay out of it.

That as got nothing to do with you or tim